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发明名称
摘要
申请公布号
JPS531742(B2)
申请公布日期
1978.01.21
申请号
JP19730015005
申请日期
1973.02.06
申请人
发明人
分类号
B21D1/02;B21B45/06;B21D1/05
主分类号
B21D1/02
代理机构
代理人
主权项
地址
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