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发明名称
TRYKKLUFT-SLAGBOR
摘要
申请公布号
NO932568(D0)
申请公布日期
1993.07.15
申请号
NO19930002568
申请日期
1993.07.15
申请人
SMITH INTERNATIONAL
发明人
JOHNS ROGER P;OLIVER MICHAEL S;BUI HUY D
分类号
E21B4/00;E21B4/14;E21B4/16;(IPC1-7):E21B/
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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