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经营范围
发明名称
BOORBEITEL.
摘要
申请公布号
NL156781(B)
申请公布日期
1978.05.16
申请号
NL19680003309
申请日期
1968.03.07
申请人
INSTITUT FRANCAIS DU PETROLE, DES CARBURANTS ET LUBRIFIANTS, RUEIL-MALMAISON, FRANKRIJK.
发明人
分类号
E21B7/18;E21B10/60;(IPC1-7):E21B9/00;E21B21/00
主分类号
E21B7/18
代理机构
代理人
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地址
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