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F21H—INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION
F21H3/00—Manufacturing incandescent mantles; Treatment prior to use, e.g. burning-off; Machines for manufacturing
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FR329438D1903-02-161903-02-16Mandrin pneumatique pour la fabrication des manchons destinés à l'éclairage par incandescence au gaz, alcool, etc.
ExpiredFR329438A
(fr)