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- energy facilities (2)
- energy transfer (2)
- thermodynamics (2)
- aerodynamics (1)
- industrial engineering (1)
- lifting and carrying (1)
- research (1)
- science / energy (1)
- technology & engineering (1)
- technology & engineering / industrial health & safety (1)
- 设计 (1)
- 调查研究 (1)
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