发布时间:2025-01-20 05:48:53
矩形钢管理论重量计算方法:(边长+边长)×2×壁厚×0.00785×长度 (单位:kg/m)
方形钢管理论重量计算方法:边长×4×壁厚×0.00785×长度 (单位:Kg/m)
如:计算100*50*3.75矩形钢管一米重量
(100+50)×2×3.75×0.00785×1=17.6625kg/m
家里的墙壁出现了很多裂缝看上去特别闹心该如何维修可以恢复如初呢
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