工字轮容绳（丝）量公式的推导与应用

Deduction and Application for Formula of Rope(Wire) Capacity Of Spool

用数学方法推导出工字较容绳（丝）量的理论公式，对理论公式进行修正后得到了实用经验公式。经验公式使用方便，用它计算的结果较传统公式准确。

Theoretical formula for calculating rope(wire)capacity of spool has been deduced by using mathematicl method,a practical formula can be made after revising this formula,the practical formula is use conveniently,the calculated result is more accurate than that of the traditional formula.