With asbestos cement mortar pipe being used as inner liner, concrete is cast to form hollow slab.

以石棉水泥砂浆离心管作为内模衬管，浇筑混凝土后构成现浇混凝土空心板。

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With asbestos cement mortar pipe being used as inner liner, concrete is cast to form hollow slab.

以石棉水泥砂浆离心管作为内模衬管，浇筑混凝土后构成现浇混凝土空心板。

youdao