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发明名称
摘要
申请公布号
JPS5319470(B2)
申请公布日期
1978.06.21
申请号
JP19740055795
申请日期
1974.05.18
申请人
发明人
分类号
B21D11/14;B21D11/06;B21F3/04;B21F7/00
主分类号
B21D11/14
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