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发明名称
Compensating winding gear for cameras
摘要
申请公布号
US1812182(A)
申请公布日期
1931.06.30
申请号
US19290363840
申请日期
1929.05.16
申请人
THOMPSON EUGENE C
发明人
THOMPSON EUGENE C.
分类号
G03B19/04
主分类号
G03B19/04
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