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发明名称
Spring bar
摘要
申请公布号
US2063733(A)
申请公布日期
1936.12.08
申请号
US19350003443
申请日期
1935.01.25
申请人
GREENBERG CHARLES B
发明人
GREENBERG CHARLES B.
分类号
G04B37/14
主分类号
G04B37/14
代理机构
代理人
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