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- handbooks, manuals, etc (9)
- materials (3)
- metal-cutting (2)
- metal-work (2)
- production engineering (2)
- design and construction (1)
- food industry and trade (1)
- glass (1)
- mechanical engineering (1)
- plastics (1)
- structural design (1)
- telecommunication systems (1)
- 安全技术 (1)
- 工程施工 (1)
- 建筑规范 (1)
- 手册 (1)
- 技术规范 (1)
- 道路施工 (1)
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