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发明名称
Operating mechanism for the fire shutter of moving picture projectors
摘要
申请公布号
US1835159(A)
申请公布日期
1931.12.08
申请号
US19270189343
申请日期
1927.05.06
申请人
HOLMAN ARTHUR J
发明人
HOLMAN ARTHUR J.
分类号
G03B21/18
主分类号
G03B21/18
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