发布时间:2025-01-19 11:19:06
1、(0.14+0.02*2+0.05*2-0.0025*2*2)*7.85*2.5=5.299kg/M
2、(0.14+0.02*2+0.06*2-0.0025*2*2)*7.85*2.5=5.691kg/M
3、不知道
140mm为高
50、60mm为宽
20mm折边
2.5mm厚度 C型檩条
地基倒好混泥土要用水保养几天可是我的从来没有保养过每天都是火辣的太阳爆晒
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