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发明名称
EARTH-REMOVING DEVICE FOR SCREW AUGER
摘要
申请公布号
JPH08284574(A)
申请公布日期
1996.10.29
申请号
JP19950089412
申请日期
1995.04.14
申请人
SEIKO KOGYO KK
发明人
TAZAKI YASUAKI;KUNITO EIJI
分类号
E21B12/06;(IPC1-7):E21B12/06
主分类号
E21B12/06
代理机构
代理人
主权项
地址
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