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Publication of FR320150ApublicationCriticalpatent/FR320150A/fr
B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
B28D5/02—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills
B28D5/021—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills by drilling
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FR320150D1902-04-021902-04-02Nouvelle machine pour le percage des perles fines
ExpiredFR320150A
(fr)