发布时间:2025-01-19 02:27:50
1/6-1/4内。为保证梁底方木安装方便,弧形梁模板弧长控制在1.2m1.5m左右为宜。,三铰拱或弧形轻型桁架,至于拱高,可在1/6-1/4内取值,南方防风,北方防雪。
请问一下自从家里重新装修过水电重新铺设以后家里自来水出水就很小这是怎么回事啊
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