应在供电线路中安装铁壳闸刀开关一只，供此箱专用，并将外壳接地。
A knife switch with iron shell shall be installed in the power supply line, which is exclusively for this oven, and the outer plate shall be grounded.
电瓷件、瓷灯头、瓷灯座、座熔断器、绝缘子、闸刀开关、瓷接器、瓷插座等各式灯座。
Produces including lampholders porcelain lampholder fuse box insulator knife switch adapter block porcelain socket porcelain etc.
电瓷件、瓷灯头、瓷灯座、座熔断器、绝缘子、闸刀开关、瓷接器、瓷插座等各式灯座。
Produces including lampholders porcelain lampholder fuse box insulator knife switch adapter block porcelain socket porcelain etc.
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