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从矿产资源到工业价值

白皮书08 · 附录D · 英文原文

数据表

Data tables behind the figures

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版本日期
2026年10月10日

本附录未收入中文摘要版,以下为英文原文。

本章目录(19)
  1. D.1 Figure ES.1: workforce by phase
  2. D.2 Figure 1.2: direct jobs per million tonnes
  3. D.3 Figure 2.1: young people reaching working age and new jobs
  4. D.4 Figure 2.2: unemployment by education and sex
  5. D.5 Figure 2.3: employment by institutional sector
  6. D.6 Figure 3.1: institutions on the map
  7. D.7 Figure 3.2: vocational training by region
  8. D.8 Figure 4.1: skills-gap assessment
  9. D.9 Figure 4.3: firms offering formal training
  10. D.10 Figure 5.2: time to competence
  11. D.11 Figure 6.1: local-sourcing objectives
  12. D.12 Figure 6.3: local procurement at Dangote Cement
  13. D.13 Figure 7.1: women along the skills pipeline
  14. D.14 Figure 8.1: work accidents and insurance by region
  15. D.15 Figure 8.2: worldsteel safety and training indicators
  16. D.16 Figure 9.1: workforce by phase
  17. D.17 Figure 9.2: training timeline
  18. D.18 Figure 9.3: localisation objectives
  19. D.19 Diagrams without quantitative data

This annex prints the values plotted in each chart and map of the paper, so that readers can check them, reuse them and cite them without reading values off a graphic. The tables are generated directly from the data files published with the web edition, so they cannot drift from the charts. Each table gives the unit, the status of the values (sourced, derived, assumed or illustrative, as defined in Annex A) and the source. Where the source table contains columns that help to interpret a chart, they are added and identified as such. Diagrams that carry no quantitative data (Figures 1.1, 4.2, 5.1, 6.2, 8.3 and 10.1) are summarised in the last section.

D.1 Figure ES.1: workforce by phase

Central planning values and ranges for the construction peak and the operating workforce of a phased EAF works at Kribi. The status of each value is shown; none is a commitment.

Table D.1 Values plotted in Figure ES.1: indicative workforce by phase (people)

Phase and workforce Central value Low High Status
Construction peak, Phase 1 800 600 1,000 assumed
Operations, Phase 1 (0.3 Mtpa nameplate), direct 500 450 550 planned
Operations, Phase 1, indirect 1,000 800 1,500 planned
Operations, full works (1 Mtpa), direct 1,100 900 1,300 indicative

Source: Cameroon Steel reference configuration RC-1 (planning estimate), edition 10 October 2026 (RC-1.1) [S11].

D.2 Figure 1.2: direct jobs per million tonnes

Direct employment divided by annual capacity (plants) or, for the EU, 2024 employment divided by average annual output. The ratio is Cameroon Steel arithmetic on the published job and capacity figures; definitions of jobs and capacity differ between sources.

Table D.2 Values plotted in Figure 1.2: direct jobs, capacity or output, and jobs per Mt

Plant or industry Direct jobs Mt Jobs per Mt Status Source
CMC micro mill, Berkeley County WV (US), rebar 230 0.454 507 sourced [S04]
Nucor micro mill, Lexington NC (US), rebar 200 0.390 513 sourced [S03]
Cameroon Steel, full works (indicative) 1,100 1.000 1,100 indicative [S11]
Cameroon Steel, Phase 1 (planned) 500 0.300 1,667 planned [S11]
EU steel industry (2024 jobs, average annual output) 298,000 146.000 2,041 sourced [S02]
Prometal plants 4 and 5, Douala 1,000 0.360 2,778 sourced [S07]
Devki, Kwale (Kenya), ore-based 2,500 0.500 5,000 sourced [S05]

Source: as listed; ratios derived by Cameroon Steel. Nucor (430,000 tons) and CMC (500,000 tons) capacities are read as US short tons, as CMC’s annual report defines its ton [S82], and converted to 0.390 Mt and 0.454 Mt. Cameroon Steel full works shown at the central value of a 900 to 1,300 range.

D.3 Figure 2.1: young people reaching working age and new jobs

The first value is derived from the World Bank’s population estimate for 2025 of people aged 10 to 14, divided by five; the second scales it to the provisional 2026 census count of 22.7 million (Annex A); the others are as reported by the national employment observatory.

Table D.3 Values plotted in Figure 2.1 (people or jobs per year)

Series Value Status Source
Reaching age 15 per year (derived: 3,640,612 aged 10-14 in 2025 / 5) 728,122 derived [S14]
Same cohort scaled to the provisional 2026 census count (728,122 x 22.7 / 29.9, rounded) 553,000 derived [S14][S19]
New jobs recorded 2025 197,356 sourced [S17]
Objective 300,000 sourced [S17]

Source: World Bank, World Development Indicators [S14]; Journal du Cameroun, 5 October 2026, provisional census count [S19]; Cameroon Tribune, 8 May 2026, reporting ONEFOP [S17].

D.4 Figure 2.2: unemployment by education and sex

ILO unemployment rate (SU1) for persons aged 14 and over in 2021, from the national employment survey. The age-group rates from the same survey are added for reference.

Table D.4 Values plotted in Figure 2.2: ILO unemployment rate by level of education and sex, 2021 (%)

Level of education Men Women All
No schooling 1.8 1.5 1.6
Primary 2.2 3.3 2.7
Lower secondary 4.8 8.0 6.1
Upper secondary 6.8 14.0 9.5
Higher education 12.1 28.2 17.6

Table D.5 Additional reference: ILO unemployment rate by age group and sex, 2021 (%)

Age group Men Women All
14 to 34 8.1 13.8 10.4
35 to 64 2.3 3.1 2.7
65 and over 2.0 0.0 1.1
All ages 14+ 5.1 7.5 6.1

Source: INS, EESI3 Phase 1, main employment report, Table 4.1 [S12]. Status: sourced.

D.5 Figure 2.3: employment by institutional sector

Share of employed persons by institutional sector in 2021, for all workers aged 14 and over and for workers aged 14 to 34.

Table D.6 Values plotted in Figure 2.3 (% of employed persons, 2021)

Institutional sector All workers aged 14+ Workers aged 14 to 34
Formal private 5.1 5.7
Public 8.2 6.4
Informal non-agricultural 52.0 59.2
Informal agricultural 34.7 28.6
Total 100.0 100.0

Source: INS, EESI3 Phase 1, main employment report, Table 3.7 [S12]. Status: sourced.

D.6 Figure 3.1: institutions on the map

City-level locations of the institutions shown in Figure 3.1, with the straight-line distance from Kribi town centre. No site boundaries are used.

Table D.7 Locations plotted in Figure 3.1

City Type Institutions shown Distance from Kribi (km)
Kribi Industrial-port zone industrial-port zone (KPIZ steel cluster) 0
Douala University school or institute ISTD (IUT), ENSPD, ENSET; CFP d’excellence; CFPS 126 km
Limbe Public vocational centre CFP d’excellence 143 km
Edéa Public vocational centre CFPS 99 km
Yaoundé University school or institute ENSPY (Univ. of Yaoundé I) 206 km
Ebolowa University school or institute University of Ebolowa, incl. ENSET 138 km
Sangmélima Public vocational centre CFP d’excellence 230 km
Meyomessala University school or institute ENSPY annex 260 km
Ngaoundéré University school or institute IUT, EGCIM 635 km
Meiganga University school or institute EGEM (mines) 629 km

Source: institutions as cited in Chapter 3 [S18][S20][S21][S22][S23][S24][S25]; boundaries from Natural Earth (public domain); distances derived by Cameroon Steel from OpenStreetMap city locations [S75].

D.7 Figure 3.2: vocational training by region

Share of persons aged 14 and over who follow or have followed vocational training, by survey region, in 2021. Urban and rural values from the same source table are added; Douala and Yaoundé are entirely urban.

Table D.8 Values plotted in Figure 3.2 (% of persons aged 14+, 2021)

Survey region All (plotted) Urban Rural
Yaoundé 43.2 43.2 n/a
Douala 40.5 40.5 n/a
Littoral (excl. Douala) 34.8 38.5 29.2
South-West 34.5 32.9 36.0
South 32.2 38.7 25.5
Centre (excl. Yaoundé) 30.9 34.2 27.6
West 27.4 32.0 21.0
North-West 21.9 29.8 15.7
East 20.9 33.2 11.3
Adamawa 14.3 18.1 9.7
Far North 8.0 14.2 4.6
North 6.4 12.0 3.1
Cameroon 25.0 32.9 13.4

Source: INS, EESI3 Phase 1, main employment report, Table 2.9 [S12]. Status: sourced.

D.8 Figure 4.1: skills-gap assessment

Scores on a four-step scale (1 small, 2 moderate, 3 large, 4 critical) by occupational family and dimension. Scoring rules are set out in Annex A. The last column is the simple average of the four scores, used only to order priorities.

Table D.9 Values plotted in Figure 4.1 (score 1 to 4)

Occupational family Experienced supply Training capacity Certification Time to competence Average
EAF and ladle-furnace operation 4 4 4 4 4.00
Continuous casting 4 4 4 3 3.75
Rolling and roll-shop 3 3 3 3 3.00
Mechanical maintenance 2 2 3 2 2.25
Electrical, automation, instrumentation 3 2 3 3 2.75
Welding and fabrication 2 2 3 2 2.25
Metallurgy and quality lab 3 3 2 3 2.75
Crane, mobile plant and logistics 1 2 2 1 1.50
HSE and emergency response 2 2 2 2 2.00
Supervision and shift management 3 3 4 4 3.50

Source: Cameroon Steel assessment (Annex A). Status: assumed.

D.9 Figure 4.3: firms offering formal training

Share of firms offering formal training to their permanent full-time employees, from the World Bank’s Enterprise Surveys.

Table D.10 Values plotted in Figure 4.3 (% of firms)

Economy and survey year Firms offering formal training
Cameroon 2009 25.5
Cameroon 2016 37.6
Cameroon 2024 24.0
Sub-Saharan Africa (latest) 27.8

Source: World Bank, Enterprise Surveys, via the World Development Indicators API, updated 8 October 2026 [S15]. Status: sourced.

D.10 Figure 5.2: time to competence

Planning assumptions for the months from the start of initial training to independent competence, in three segments: initial qualification, minimum in-plant training, and in-plant training up to a typical maximum.

Table D.11 Values plotted in Figure 5.2 (months)

Role Initial qualification In-plant, minimum In-plant, maximum Total, minimum Total, maximum
Crane and mobile-plant operator 3 3 9 6 12
Production operator (mill, finishing, dispatch) 3 6 12 9 15
Certified welder (ISO 9606-1 coded) 6 6 12 12 18
Mechanical maintenance technician 24 6 18 30 42
Electrical and automation technician 24 12 24 36 48
Caster operator 6 12 24 18 30
EAF and ladle-furnace operator (melter) 6 18 36 24 42
Process metallurgist 60 12 24 72 84
Shift manager 60 48 72 108 132

Source: Cameroon Steel planning assumptions (Annex A). Status: assumed.

D.11 Figure 6.1: local-sourcing objectives

Illustrative objectives for the share of each procurement category’s spend placed with Cameroonian-registered suppliers in the first and fifth years of operation. They are objectives for planning and dialogue, not commitments or forecasts.

Table D.12 Values plotted in Figure 6.1 (% of category spend)

Procurement category First year Fifth year Change (points)
Catering, cleaning, security 90 100 10
Road haulage and port handling 80 95 15
Civil works and building materials 85 95 10
Mechanical maintenance services 40 75 35
Electrical installation and repair 35 70 35
Machining, roll and spare-part repair 20 55 35
Lime, aggregates and slag handling 30 60 30
Industrial gases (on-site plant) 20 40 20
Refractories and refractory services 10 30 20
Ferro-alloys and graphite electrodes 0 5 5

Source: Cameroon Steel analysis (Annex A). Status: illustrative.

D.12 Figure 6.3: local procurement at Dangote Cement

Local share of total procurement as reported by Dangote Cement Plc; total and local procurement amounts are added from the same report.

Table D.13 Values plotted in Figure 6.3

Year Local share of procurement (%) Total procurement (₦ million) Local procurement (₦ million)
2023 72 1,108,083 793,620
2024 75 1,899,869 1,419,972
2025 82 2,087,497 1,719,166

Source: Dangote Cement Plc, Annual Report and Accounts 2025, pages 53 to 54 [S42]. Status: sourced.

D.13 Figure 7.1: women along the skills pipeline

Share of women in each group, from the latest available year for each source.

Table D.14 Values plotted in Figure 7.1 (% women)

Group Women (%) Source
Labour force, Cameroon, 2025 43.9 [S14]
Vocational secondary pupils, Cameroon, 2016 36.6 [S16]
Apprentices, Germany (dual system) 35.0 [S48]
Tertiary STEM graduates, Cameroon, 2023 24.6 [S16]
Workforce of worldsteel reporting members, 2024 11.4 [S51]
Workforce, Dangote Cement group, 2025 9.0 [S42]

Source: as listed. Status: sourced. The Dangote Cement value is the group total (1,110 women of 12,227 employees, excluding the transport division) [S42].

D.14 Figure 8.1: work accidents and insurance by region

Share of employed persons who reported a work accident in their main job in the previous twelve months, and share covered by insurance in their main job, by survey region, in 2021. The occupational-disease rate from the same source table is added.

Table D.15 Values plotted in Figure 8.1 (% of employed persons, 2021)

Survey region Work accident Insured Occupational disease (added)
South-West 17.9 21.0 10.5
Littoral (excl. Douala) 15.9 9.3 10.0
South 15.4 6.6 15.5
Centre (excl. Yaoundé) 13.7 13.9 8.4
North-West 12.8 9.0 9.7
East 11.7 5.9 3.8
Yaoundé 8.4 23.5 7.0
North 7.8 3.8 5.3
West 7.7 10.1 8.5
Douala 6.9 20.3 5.7
Adamawa 6.0 6.5 4.1
Far North 5.1 2.8 3.0
Cameroon 9.1 11.0 6.5

Source: INS, EESI3 Phase 1, main employment report, Table 3.24 [S12]. Status: sourced.

D.15 Figure 8.2: worldsteel safety and training indicators

Lost-time injury frequency rate (lost-time injuries and fatalities per million hours worked) and training days per employee, for the steel companies reporting to the World Steel Association.

Table D.16 Values plotted in Figure 8.2

Year LTIFR (per million hours) Training days per employee
2022 0.85 8.22
2023 0.76 8.98
2024 0.72 6.77

Source: worldsteel, Sustainability Indicators, 2025 edition [S51]. Status: sourced. Women were 11.44% of the reporting members’ workforce in 2024 [S51].

D.16 Figure 9.1: workforce by phase

Planned first-phase direct workforce by occupational family, indicative full-works workforce and assumed first-phase construction peak.

Table D.17 Values plotted in Figure 9.1 (people)

Item Central value Low High Status
Phase 1 operations: operators 300 planned
Phase 1 operations: technicians 100 planned
Phase 1 operations: engineers 50 planned
Phase 1 operations: administration and support 50 planned
Phase 1 operations: total 500 450 550 planned
Full works operations (about 1 Mtpa) 1,100 900 1,300 indicative
Phase 1 construction peak 800 600 1,000 assumed

Source: Cameroon Steel reference configuration RC-1 (planning estimate), edition 10 October 2026 (RC-1.1) [S11].

D.17 Figure 9.2: training timeline

Start and end of each activity in months relative to first steel in the first phase (negative values are before first steel), with the calendar month that follows if first heat comes at the start of the second half of 2030 on the RC-1.1 schedule; a later first heat moves every date by the same interval.

Table D.18 Values plotted in Figure 9.2 (months relative to first steel, and calendar on the RC-1.1 schedule)

Activity Start End Duration (months) Calendar start Calendar end
Sector skills partnership signed; curricula co-design −42 −30 12 Jan 2027 Jan 2028
Graduate engineers recruited; placements at operating plants −36 −6 30 Jul 2027 Jan 2030
Dual apprenticeship, intake 1 (two years) −30 −6 24 Jan 2028 Jan 2030
Upskilling of experienced technicians and welders −24 −3 21 Jul 2028 Apr 2030
Operator recruitment and simulator training −18 −3 15 Jan 2029 Apr 2030
Vendor (OEM) training at supplier sites and on site −12 0 12 Jul 2029 Jul 2030
Cold commissioning with vendor specialists −6 0 6 Jan 2030 Jul 2030
Hot commissioning and ramp-up with vendor supervision 0 12 12 Jul 2030 Jul 2031
Handover of expatriate roles to Cameroonian staff 6 36 30 Jan 2031 Jul 2033
Apprenticeship intakes 2, 3... for Phases 2 and 3 6 48 42 Jan 2031 Jul 2034

Source: Cameroon Steel proposal (Chapter 9; Annex A); first heat in the second half of 2030 from the Cameroon Steel reference configuration RC-1 (planning estimate), edition RC-1.1 [S11]. Status: illustrative.

D.18 Figure 9.3: localisation objectives

Illustrative objectives for the share of Cameroonian nationals by occupational family in the first and fifth years of operation, with the weights of the planned first-phase mix used to compute the total.

Table D.19 Values plotted in Figure 9.3 (% of headcount)

Occupational family Weight (Phase 1 headcount) First year Fifth year
Operators 300 85 95
Technicians 100 70 90
Engineers 50 50 70
Administration and management 50 70 90
Total direct workforce 500 77 91

Source: Cameroon Steel planning objective of 90% (85 to 95%) Cameroonian operating workforce by year 5 [S11]; family values are illustrative objectives, not commitments.

D.19 Diagrams without quantitative data

Six figures are diagrams. Their content is summarised here so that it can be read without the graphic.

Table D.20 Content of the diagrams

Figure Diagram Content
Figure 1.1 Occupational map Process areas: Raw materials yard; Melt shop (EAF); Ladle furnace; Continuous caster; Reheating and rolling mill; Finishing and dispatch. Support functions: Maintenance; Electrical and automation; Quality and metallurgy; Health, safety and environment; Logistics and administration.
Figure 4.2 Career paths Production: Bac technique, CAP or CQP + induction > Operator (0 to 3 yrs) > Senior operator, furnace or mill (3 to 6) > Shift supervisor (6 to 10) > Area or production manager (10+). Maintenance and automation: DUT, BTS or HND (IUT, CFP d’excellence) > Maintenance technician (0 to 3) > Senior technician, PLC or hydraulics (3 to 7) > Maintenance planner or reliability lead (7 to 10) > Maintenance manager (10+). Engineering and metallurgy: Engineering degree (ENSPY, ENSPD, EGCIM) > Graduate engineer, plant rotation (0 to 2) > Process engineer or metallurgist (2 to 6) > Senior metallurgist or quality manager (6 to 12) > Plant or technical director (12+).
Figure 5.1 Dual apprenticeship cycle Selection > School block > Plant block > Assessment > Certification, with four to six alternations over 24 months.
Figure 6.2 Supplier-development ladder Register > Qualify > Pilot order > Coach > Approved > Regional.
Figure 8.3 Safety-culture maturity Reactive > Compliant > Managed > Proactive > Owned.
Figure 10.1 Skills-partnership governance Steering committee (MINEFOP, MINESUP, MINESEC, MINMIDT, KPIZ, employers, unions) over training providers, employers and funding; outputs: curricula and standards, apprenticeship places, trainer upskilling, certification, tracer studies, women’s participation targets.

Source: Cameroon Steel. Status: illustrative.

本章引用的资料来源

方括号内的标记对应以下来源(按原文语言列出),完整列表见附录。 完整来源列表

  1. S11Cameroon Steel reference configuration RC-1 (planning estimate), edition 10 October 2026 (RC-1.1). Cameroon Steel,2026年10月10日.按标题和日期引用
  2. S04Rebar manufacturing facility coming to Eastern Panhandle. West Virginia Public Broadcasting,2022年12月8日.wvpublic.org/story/economy/rebar-manufacturing-facility-coming-to-east…
  3. S03Nucor to build new rebar micro mill in North Carolina. Nucor Corporation,2022年4月7日.nucor.com/news-release/nucor-to-build-new-rebar-micro-mill-in-north-ca…
  4. S02European Steel in Figures 2025. EUROFER,2025年6月.eurofer.eu/assets/publications/brochures-booklets-and-factsheets/europ…
  5. S07Prometal inaugure deux usines évaluées à 57 milliards F. Journal du Cameroun,2024年1月19日.fr.journalducameroun.com/prometal-inaugure-deux-usines-evaluees-a-57-m…
  6. S05Devki opens Sh50bn steel plant in Kwale. Capital FM Kenya,2022年11月20日.capitalfm.africa/devki-opens-sh50bn-steel-plant-in-kwale/
  7. S82Annual report on Form 10-K for the fiscal year ended 31 August 2025 ("Any reference in this Annual Report to a ton refers to the U.S. short ton, a unit of weight equal to 2,000 pounds"). Commercial Metals Company (US Securities and Exchange Commission, EDGAR),2025年财政年度(访问于2026年10月11日).sec.gov/Archives/edgar/data/22444/000002244425000138/cmc-20250831.htm
  8. S14World Development Indicators, Cameroon: population by age, labour force, ILO modelled labour indicators, Human Capital Index. World Bank,更新:2026年10月8日.api.worldbank.org/v2/country/CMR/indicator/SL.UEM.TOTL.ZS?format=json
  9. S19Cameroun: bouclage du 4e RGPH, 22,7 millions d’habitants recensés (provisional field count). Journal du Cameroun,2026年10月5日.fr.journalducameroun.com/cameroun-bouclage-du-4e-rgph-227-millions-dha…
  10. S17Retombées: plus de 197 000 emplois créés en 2025. Cameroon Tribune,2026年5月8日.cameroon-tribune.cm/article.html/76537/en.html/details_2
  11. S12Troisième enquête sur l’emploi et le secteur informel (EESI3), phase 1: enquête emploi, rapport principal (2021 data; Tables 2.9, 3.7, 3.24 and 4.1 are cited). Institut national de la statistique (INS), Cameroon,2023年11月(文件:2025年7月).ins-cameroun.cm/wp-content/uploads/2025/07/EESI3_Rapport-principal_Emp…
  12. S18École nationale supérieure polytechnique de Yaoundé: presentation (created in 1971), departments and 2026 to 2027 entrance competition (Meyomessala annex). ENSPY.polytechnique.cm/
  13. S20Université de Douala: schools and institutes. Université de Douala.univ-douala.cm/
  14. S21Institut supérieur de technologie de Douala (ISTD): departments and key figures. ISTD, Université de Douala.iut-dla.cm/
  15. S22Établissements; Institut universitaire de technologie (identification sheet). Université de Ngaoundéré.univ-ndere.cm/fr/etablissements/
  16. S23Cameroun: les nouveaux responsables de l’université d’Ebolowa prennent fonctions. Journal du Cameroun,2024年7月23日.fr.journalducameroun.com/cameroun-les-nouveaux-responsables-de-luniver…
  17. S24Cameroon inaugurates 3 excellence training centres of FCFA 24 billion built by South Korea. Business in Cameroon,2016年12月20日.businessincameroon.com/cooperation/2012-6783-cameroon-inaugurates-3-ex…
  18. S25Former des ouvriers et techniciens qualifiés dans des métiers porteurs (project page). Agence française de développement.afd.fr/fr/projets/former-des-ouvriers-et-techniciens-qualifies-dans-de…
  19. S75OpenStreetMap place data for the ten cities of Figure 3.1, retrieved through the Nominatim geocoder (Open Database Licence). OpenStreetMap contributors.nominatim.openstreetmap.org/
  20. S15Enterprise Surveys indicator: firms offering formal training (% of firms), Cameroon and Sub-Saharan Africa. World Bank,更新:2026年10月8日.api.worldbank.org/v2/country/CMR/indicator/IC.FRM.TRNG.ZS?format=json
  21. S42Annual Report and Accounts 2025. Dangote Cement Plc,2026年6月.cement.dangote.com/wp-content/uploads/2026/06/Dangote-Cememt-Plc-2025-…
  22. S16Education indicators (UNESCO Institute for Statistics) via World Development Indicators: enrolment, vocational share, graduates by field, attainment, spending. World Bank and UNESCO UIS,更新:2026年10月8日.api.worldbank.org/v2/country/CMR/indicator/SE.SEC.ENRL.VO.ZS?format=js…
  23. S48Vocational training (theme page and press release of 12 April 2023 on new apprenticeship contracts in 2022). Federal Statistical Office of Germany (Destatis).destatis.de/EN/Themes/Society-Environment/Education-Research-Culture/V…
  24. S51Sustainability indicators (2025 report; 2022 to 2024 data). World Steel Association.worldsteel.org/wider-sustainability/sustainability-indicators/

引用本章

Cameroon Steel(2026)。只要培训先于炼钢炉启动,喀麦隆就能为本国钢铁工业培养所需人才(中文摘要版)。白皮书08,附录D:数据表。CS-WP-08。https://www.cameroon-steel.com/zh/library/skills-for-steel/annex-data-tables/