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发明名称
METHOD OF PRODUCING RINGS
摘要
申请公布号
SU1488166(A1)
申请公布日期
1989.06.23
申请号
SU19864148822
申请日期
1986.11.17
申请人
KHARLOV NIKOLAJ M,SU
发明人
KHARLOV NIKOLAJ M,SU
分类号
B21D53/16
主分类号
B21D53/16
代理机构
代理人
主权项
地址
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