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发明名称
Improved self-opening screw-threading die
摘要
申请公布号
GB409907(A)
申请公布日期
1934.05.10
申请号
GB19330015732
申请日期
1933.05.31
申请人
LA FILIERE UNICUM
发明人
分类号
B23G5/12
主分类号
B23G5/12
代理机构
代理人
主权项
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