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发明名称
摘要
申请公布号
JPS4842779(B1)
申请公布日期
1973.12.14
申请号
JP19680096301
申请日期
1968.12.28
申请人
发明人
分类号
B21B37/74;B21B37/76;C21D11/00
主分类号
B21B37/74
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代理人
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地址
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