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| 斜沟底槽板 | |||
| 屋面斜沟支承板; 斜天沟底板; 屋顶斜沟排水槽底板; 天沟底板; 斜沟底板; 斜沟槽板 | |||
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valley board : 3 phrases in 2 subjects |
| Architecture | 2 |
| Technology | 1 |
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