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Publication of FR740339ApublicationCriticalpatent/FR740339A/fr
F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V19/00—Fastening of light sources or lamp holders
F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
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FR740339D1932-07-211932-07-21Lanterne pour éclairage électrique
ExpiredFR740339A
(fr)