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发明名称
AIR-OPERATED SUBMERSIBLE DRILLING MACHINE
摘要
申请公布号
CS9005525(A3)
申请公布日期
1992.05.13
申请号
CS19900005525
申请日期
1990.11.09
申请人
PERMON
发明人
KOUDELKA VLADIMIR ING.
分类号
E21B1/32;B25D9/08;E21B1/30;E21B3/025;E21B4/14;(IPC1-7):E21C3/26;E21C3/06
主分类号
E21B1/32
代理机构
代理人
主权项
地址
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