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经营范围
发明名称
Improvements in or relating to gates for cinematograph projectors
摘要
申请公布号
GB690726(A)
申请公布日期
1953.04.29
申请号
GB19510015645
申请日期
1951.07.02
申请人
STEATIT-MAGNESIA AKTIENGESELLSCHAFT
发明人
分类号
G03B1/56
主分类号
G03B1/56
代理机构
代理人
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