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发明名称
PIPE PENETRATION
摘要
申请公布号
JPH05248166(A)
申请公布日期
1993.09.24
申请号
JP19920082819
申请日期
1992.03.03
申请人
CHUBU ELECTRIC POWER CO INC;KONOIKE CONSTR LTD
发明人
TAKI EIJI;OMI MORIO;NASU SUSUMU
分类号
E21B7/18;E21B7/20;E21D9/04;E21D9/08;E21D9/10;E21D9/12;(IPC1-7):E21D9/04
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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