1
20AWG OD:1.36 PVC
PVC用量=(1.36*1.36-0.95*0.95)*0.7854*1.45=1.1kg/km
對(duì)嗎?》???????????????
2
是不是應(yīng)該這樣算準(zhǔn)些。
如 20AWG 21/0.18 OD1.36
PVC用量=(1.36*1.36-0.18*0.18*21)*0.7854*1.45
3
PVC用量=(1.36*1.36-0.95*0.95)*0.7854*1.45*絞入系數(shù)