P:2009-10-03 22:17:50
1
UL1581和UL2556只是对耐摩擦试验的试验速度,试验仪器进行了规定,UL2556说砝码重量参考产品标准(The other end of each specimen shall be attached to a weight as defined in the product standard)。请问这个product standard 是什么?
three-and-a-half core cable - 3+1芯电缆,三大一小线芯电缆(中性线截面为主线芯一半的四芯电缆) (0) 投诉