发布时间:2025-01-31 11:52:30
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。
我家要装修所以猫咪没有地方养我想暂时放在我朋友家里可是他到了陌生环境能生存吗
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