依然 发表于 2012-12-12 11:19 # p* w$ }/ x7 F/ Q$ `- a0 W
SJT是hard usage ,SPT是No hard usage,SJT的绝缘皮要比SPT的厚。
依然 发表于 2012-12-12 17:24
参考UL62中的定义:
Not-for-hard-usage cord – a cord intended for use with light equipment, classif ...
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