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发明名称
METHOD FOR WORKING RING
摘要
申请公布号
JPH10272529(A)
申请公布日期
1998.10.13
申请号
JP19970095281
申请日期
1997.03.28
申请人
ASAHI SEIKI MFG CO LTD
发明人
KADOTA KAZUHISA
分类号
B21D39/03;B21D53/16;B21K21/06;(IPC1-7):B21D53/16
主分类号
B21D39/03
代理机构
代理人
主权项
地址
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