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发明名称
摘要
申请公布号
SU554078(A1)
申请公布日期
1977.04.15
申请号
SU19742026317
申请日期
1974.05.17
申请人
发明人
分类号
B22F3/04;B30B11/30;(IPC1-7):B22F3/04
主分类号
B22F3/04
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