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| 接户［废水］支管 | |||
| 用户接管; 住宅污水管; 住户连接线; 户内连接管 (水、气、污水管等); 室内管系; 房屋连接管; 家庭污水管道 | |||
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house connection : 3 phrases in 1 subject |
| Technology | 3 |
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