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发明名称
METHOD OF FORMING NUMEROUD FINE GROOVES ON INSIDE OF PIPE
摘要
申请公布号
JPS5261159(A)
申请公布日期
1977.05.20
申请号
JP19750137175
申请日期
1975.11.17
申请人
HITACHI LTD
发明人
OCHIAI IZUMI
分类号
B21C37/20;B21C37/15;B21D17/00;B21D51/12
主分类号
B21C37/20
代理机构
代理人
主权项
地址
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