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发明名称
METHOD OF PIERCING HOLES IN BLANKS OF SHEET MATERIAL
摘要
申请公布号
SU1480928(A1)
申请公布日期
1989.05.23
申请号
SU19874304137
申请日期
1987.06.22
申请人
GOMELSKIJ POLT INSTITUT
发明人
STRIKEL NIKOLAJ I,SU
分类号
B21D28/16
主分类号
B21D28/16
代理机构
代理人
主权项
地址
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