W=0.0267×壁厚×(外徑-壁厚)
鋁管
W=0.00879×壁厚×(外徑-壁厚)
上一頁(yè) [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] 下一頁(yè)