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发明名称
摘要
申请公布号
DD124014(A1)
申请公布日期
1977.02.02
申请号
DD19750190133
申请日期
1975.12.15
申请人
发明人
分类号
B23F21/14;(IPC1-7):B23F21/14
主分类号
B23F21/14
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代理人
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地址
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