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发明名称
Chuck device
摘要
申请公布号
US1764290(A)
申请公布日期
1930.06.17
申请号
US19280311995
申请日期
1928.10.12
申请人
ETTCO TOOL CO. INC.
发明人
EMRICK GEORGE W.
分类号
B23B31/12
主分类号
B23B31/12
代理机构
代理人
主权项
地址
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