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发明名称
METHOD FOR DETERMINING THE WEAR OF A TOOL CUTTER WHILE DRILLING ROCK FORMATIONS
摘要
申请公布号
EP0308327(B1)
申请公布日期
1992.04.22
申请号
EP19880402319
申请日期
1988.09.14
申请人
INSTITUT FRANCAIS DU PETROLE
发明人
FAY, HUBERT
分类号
E21B44/00;E21B12/02
主分类号
E21B44/00
代理机构
代理人
主权项
地址
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