Calculate the weight of steel bars of different length and diameter , each length of each diameter can be entered and the app will sum the total weight of each diam , also the sum of total weight of all diameters .
计算的不同的长度和直径的钢筋的重量,每个直径的每个长度可以输入和应用程序将总结每个直径的总重量计,所有直径的总重量的也总和。