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?
thickness of tearing after seperation - 撕裂厚度 (0) 投诉