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发明名称
CASING AUGER DEVICE
摘要
申请公布号
JPH07259464(A)
申请公布日期
1995.10.09
申请号
JP19940079493
申请日期
1994.03.26
申请人
OOHORI:KK
发明人
OHORI MASATO
分类号
E21B7/00;E21B3/02;E21B3/025;(IPC1-7):E21B3/02
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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