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经营范围
发明名称
Perfectionnement aux outils pour forage rotary
摘要
申请公布号
FR687791(A)
申请公布日期
1930.08.13
申请号
FRD687791
申请日期
1930.01.07
申请人
SOCIETE DES ANCIENS ETABLISSEMENTS DE HULSTER, FAIBIE ET COMPAGNIE
发明人
VERDAVAINNE PAUL
分类号
E21B10/26
主分类号
E21B10/26
代理机构
代理人
主权项
地址
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