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| 泥浆池; 泥浆沉淀槽 | |||
| 泥渣坑; 矿渣坑 | |||
| 污泥坑; 污油坑 | |||
| 泥浆坑; 污泥斗 | |||
| sludge pit: 1 phrase in 1 subject |
| Metallurgy | 1 |
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