Improvements in stopping-down hoods for reflector lamps,申请号GB19310004000-传众专利搜索

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发明名称	Improvements in stopping-down hoods for reflector lamps
摘要
申请公布号	GB357917(A)	申请公布日期	1931.10.01
申请号	GB19310004000	申请日期	1931.02.09
申请人	CARL ZEISS	发明人
分类号	F21V5/00	主分类号	F21V5/00
代理机构		代理人
主权项
地址

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