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PCE
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CPC Subgroup
H01K 9/06

with built-in device, e.g. switch, for automatically completing circuit of reserve body

Full Title

Lamps having two or more incandescent bodies separately heated (H01K11/00, H01K13/00 take precedence) > to provide substitution in the event of failure of one of the bodies > with built-in device, e.g. switch, for automatically completing circuit of reserve body