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发明名称
摘要
申请公布号
JPS557284(Y2)
申请公布日期
1980.02.19
申请号
JP19770025161U
申请日期
1977.03.04
申请人
发明人
分类号
B21C35/02;(IPC1-7):B21C35/02
主分类号
B21C35/02
代理机构
代理人
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地址
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