发布时间:2025-01-19 02:38:43
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。
水粉画颜料在木板子上画画可以吗我做了些道具向上色全是木头还有别的上色颜料可用吗除油漆外
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