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发明名称
Outil de forage à élasticité variable
摘要
申请公布号
FR1417972(A)
申请公布日期
1965.11.19
申请号
FR19620904703
申请日期
1962.07.20
申请人
INSTITUT FRANCAIS DU PETROLE, DES CARBURANTS ET LUBRIFIANTS
发明人
TRUYOL ALBERT
分类号
E21B10/20
主分类号
E21B10/20
代理机构
代理人
主权项
地址
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