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发明名称
摘要
申请公布号
SU555959(A1)
申请公布日期
1977.04.30
申请号
SU19752121444
申请日期
1975.04.07
申请人
发明人
分类号
B21J5/04;(IPC1-7):B21J5/04
主分类号
B21J5/04
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代理人
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地址
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