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发明名称
Method and means for producing curved-threaded nuts
摘要
申请公布号
GB336106(A)
申请公布日期
1930.10.09
申请号
GB19290031476
申请日期
1929.10.16
申请人
ELIS HELIN
发明人
分类号
B23G7/00
主分类号
B23G7/00
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代理人
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