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发明名称
摘要
申请公布号
JPS5246905(B2)
申请公布日期
1977.11.29
申请号
JP19760014301
申请日期
1976.02.12
申请人
发明人
分类号
B21D19/12;B21D9/12
主分类号
B21D19/12
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