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厂房承受重量每平方500kg,机器重量2.5吨,大小1.4MX0.6M接触面积,需要加多厚的钢板? |
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小黑屋|手机版|Archiver|机械必威体育网址 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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