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air-line system | |||
air duct system |
风管 系统 : 43 phrases in 10 subjects |
Architecture | 1 |
Earth sciences | 1 |
Finances | 1 |
Hydroelectric power stations | 1 |
Metallurgy | 7 |
Nautical | 3 |
Project management | 1 |
Rail transport | 1 |
Refrigeration | 10 |
Technology | 17 |