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| 重活; 非直接性生产工作; 干舷; 船体水上部分; 上层建筑; 水线上部建筑 | |||
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| 准备工作; 非生产性工作 | |||
| 非直接性生产工作 | |||
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dead works : 1 phrase in 1 subject |
| Earth sciences | 1 |
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