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发明名称
摘要
申请公布号
DE2031915(A1)
申请公布日期
1971.01.14
申请号
DE19702031915
申请日期
1970.06.27
申请人
发明人
分类号
B23K35/28;C22C21/02;E21B10/46;(IPC1-7):23K35/28
主分类号
B23K35/28
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代理人
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