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发明名称
CASING FOR SHAFT EXCAVATION
摘要
申请公布号
JPH1122356(A)
申请公布日期
1999.01.26
申请号
JP19970197819
申请日期
1997.07.07
申请人
COPUROSU:KK
发明人
MIYAZAKI KAORU
分类号
E21B7/20;E21D1/06;(IPC1-7):E21B7/20
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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