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发明名称
GROUND DRILL
摘要
申请公布号
JPH116385(A)
申请公布日期
1999.01.12
申请号
JP19970158909
申请日期
1997.06.16
申请人
YUBIRON FUAKUTO:KK;OMIC:KK
发明人
SUZUKI TOMOJI;OTSUBO NORIO
分类号
E21B7/04;E21B7/02;E21B15/00;E21B15/04;E21B19/08;(IPC1-7):E21C11/00
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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