gravel wall well 中文意思是什麼
gravel wall well
解釋
填礫井-
Test result indicates that, by means of using proper gravel - gradation and technology, the performance of pumice concrete can well meet the need of our country wall materials
試驗結果表明,利用適當的骨料級配和生產工藝,可使浮石混凝土的各項性能指標能很好地滿足目前我國的建築墻體材料性能要求。
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