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发明名称
Mask for light sources
摘要
申请公布号
US2756325(A)
申请公布日期
1956.07.24
申请号
US19500198290
申请日期
1950.11.30
申请人
FRANZ ZWICK
发明人
ZWICK FRANZ
分类号
F21V11/00;F21V11/06
主分类号
F21V11/00
代理机构
代理人
主权项
地址
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