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vital part | |||
major part | |||
major parts | |||
critical part | |||
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main parts; major part | |||
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major parts |
主 要 零件: 18 phrases in 7 subjects |
Architecture | 1 |
Aviation | 10 |
Hydroelectric power stations | 3 |
Oil processing plants | 1 |
Racing and motorsport | 1 |
Space | 1 |
Watchmaking | 1 |