发布时间:2025-01-31 11:56:06
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。
石膏玩偶画完水彩后还需要刷亮漆吗我看他们做的很光亮是怎么个绘画过程啊求答
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