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发明名称
摘要
申请公布号
JPS5620941(B2)
申请公布日期
1981.05.16
申请号
JP19740005222
申请日期
1974.01.09
申请人
发明人
分类号
B21J5/02;B21J13/02;B21K1/30
主分类号
B21J5/02
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代理人
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地址
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