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| 箱形排水沟 | |||
| 箱形排水渠 | |||
| 方形沟; 匣形沟渠; 方沟 | |||
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| 箱形阴沟〔排水渠〕 | |||
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box drain : 7 phrases in 3 subjects |
| Architecture | 1 |
| Metallurgy | 2 |
| Technology | 4 |
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