楼板套管
Floor casing
以上为机器翻译结果,长、整句建议使用 人工翻译 。
雨水管穿过墙壁和楼板按要求设置套管。
Rain water pipe through the walls and floor in accordance with the requirements set casing.
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然后浇筑混凝土,将套管预埋在预应力空心楼板内;
Then concrete is poured, and the sleeve is pre-embedded in the prestressed hollow floor slab;
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