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| sealing water pipe; stink trap; syphon trap; water sealing pipe | |||
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| sealing pipe | |||
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水封管 : 35 phrases in 8 subjects |
| Architecture | 1 |
| Aviation | 2 |
| Drilling | 9 |
| Electric machinery | 1 |
| Hydroelectric power stations | 5 |
| Mining | 1 |
| Oil / petroleum | 3 |
| Technology | 13 |
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