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- 研究 (3)
- astronautics (1)
- economic aspects (1)
- electric power (1)
- energy conservation (1)
- energy consumption (1)
- engineering (1)
- handbooks, manuals, etc (1)
- intellectual property (1)
- law and legislation (1)
- management (1)
- public administration (1)
- study and teaching (1)
- system safety (1)
- technology transfer (1)
- telecommunication (1)
- universities and colleges (1)
- water resources development (1)
- water-supply (1)
- 企业管理 (1)
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