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发明名称
摘要
申请公布号
JPH0130571(B2)
申请公布日期
1989.06.21
申请号
JP19810502800
申请日期
1981.08.27
申请人
发明人
分类号
B21D41/04;B21D51/26
主分类号
B21D41/04
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