弯头面积型号π管径(m)圆弧长度(m)弯头个数面积π弯曲半径圆弧系数90°3.14159263.14159260.250.0060°3.14159263.14159260.16670.0045°3.14159263.14159260.1250.0030°3.14159263.14159260.08330.00管道面积型号π管径(m)长度(m)面积(㎡)圆管3.14159260.00异径管面积型号π大头管径小头管径大小头长度个数面积异径管3.14159260.00三通面积型号π长度管径(m)高度管径(m)长度(m)高度(m)三通个数面积三通3.14159260.00
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