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发明名称
DRILLING SLIME REMOVAL DEVICE
摘要
申请公布号
KR0133252(Y1)
申请公布日期
1999.02.18
申请号
KR19960005685U
申请日期
1996.03.23
申请人
PARK, HYUNG-KOOK
发明人
PARK, HYUNG-KOOK
分类号
E21B23/00;(IPC1-7):E21B23/00
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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