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发明名称
摘要
申请公布号
JPS5225827(B2)
申请公布日期
1977.07.09
申请号
JP19720047822
申请日期
1972.05.15
申请人
发明人
分类号
B21F3/04;B21D3/04
主分类号
B21F3/04
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代理人
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