发布时间:2025-01-22 12:54:14
钢管的重量=0.25×π×(外径平方-内径平方)×L×钢铁比重 其中:π = 3.14 L=钢管长度 钢铁比重取7.8 所以, 钢管的重量=0.25×3.14×(外径平方-内径平方)×L×7.8 * 如果尺寸单位取米(M),则计算的重量结果为公斤(Kg)
钢的密度为: 7.85g/cm3
作为基坑支护的钻孔灌注桩打桩遇到中风化怎么办,未到设计底标高
2025-01-22 12:54:14 2025-01-22 12:54:14 2025-01-22 12:54:14 2025-01-22 12:54:14 2025-01-22 12:54:14 2025-01-22 12:54:14 2025-01-22 12:54:14 2025-01-22 12:54:14我是在宿舍的住的睡的是木板床床上出现了很多这种虫这是什么虫呢
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