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Improvements in the construction of supports with positive carbon advance device for voltaic arch projection lights (Machine-translation by Google Translate, not legally binding)
Improvements in the construction of supports with positive carbon advance device for voltaic arch projection lights (Machine-translation by Google Translate, not legally binding)
Improvements in the construction of positive carbon supports for flashlights of arc projection, characterized in that its frame is essentially fixed to the body of the flashlight and the advance of the coal is obtained by advancing it with respect to the support. (Machine-translation by Google Translate, not legally binding)
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