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发明名称
Follow focus mechanism
摘要
申请公布号
US1981185(A)
申请公布日期
1934.11.20
申请号
US19330662957
申请日期
1933.03.27
申请人
MITCHELL CAMERA CORPORATION
发明人
MITCHELL GEORGE A.
分类号
G03B19/18
主分类号
G03B19/18
代理机构
代理人
主权项
地址
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