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发明名称
UNTERIRDISCHES ROHR FÜR EIN VORTRIEBSBOHRVERFAHREN UND VERBINDUNGSSTRUKTUR EINES DERARTIGEN ROHRES.
摘要
申请公布号
DE68916636(D1)
申请公布日期
1994.08.11
申请号
DE19896016636
申请日期
1989.10.05
申请人
SEKISUI KAGAKU KOGYO K.K., OSAKA, JP;C.I. KASEI CO., LTD., TOKIO/TOKYO, JP
发明人
SHIBAHARA, SHIGEYOSHI 223-87, ONO RITTO-SHO, SHIGA 520-30, JP;MORIMOTO, TAKAHIRO, KYOTO 617, JP
分类号
E21B7/20;E21B17/00;E21B17/04;E21B17/08;E21B17/10;(IPC1-7):E21B17/08
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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