发布时间:2025-01-19 02:23:52
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。
如图是由两个相同的圆柱组成的图形从上面看到的形状是 a b c d
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