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发明名称
METAL FIXTURE FOR FIXING AND COUPLING UNDERGROUND JOINED PIPES FOR EXCAVATION
摘要
申请公布号
JPS52106301(A)
申请公布日期
1977.09.06
申请号
JP19760023632
申请日期
1976.03.03
申请人
TAKENAKA KOMUTEN CO
发明人
YAMASHITA SUSUMU;OKADA MASANORI
分类号
E21B17/08;E21B19/00
主分类号
E21B17/08
代理机构
代理人
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