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发明名称
摘要
申请公布号
JPS525020(B2)
申请公布日期
1977.02.09
申请号
JP19720032845
申请日期
1972.03.31
申请人
发明人
分类号
B21D7/06;B21D7/03
主分类号
B21D7/06
代理机构
代理人
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地址
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