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| 下落管; 下流管 | |||
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| 水落管 | |||
| 深井井管 | |||
| 向下支管 | |||
| 下悬喷管; 下落管; 水井竖管 | |||
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| 下悬喷管; 水井竖管; 深井井管; 混凝土浇注吊管 | |||
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dropping pipe : 15 phrases in 7 subjects |
| Architecture | 1 |
| Construction | 1 |
| Earth sciences | 1 |
| Engineering geology | 2 |
| Metallurgy | 1 |
| Refrigeration | 1 |
| Technology | 8 |
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