Isolating switch porcelain knob insulating barrier
The utility model discloses an isolating switch porcelain knob insulating barrier which comprises an insulating square board (3) and two insulating movable boards (1). The middle part of the lower side of the insulating square board (3) is provided with two semispherical gaps (6). Two corners of the...
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Format: | Patent |
Sprache: | chi ; eng |
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