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发明名称
APPAREIL DE PUITS
摘要
申请公布号
FR2581419(B1)
申请公布日期
1989.06.02
申请号
FR19860006461
申请日期
1986.05.05
申请人
AVA INTERNATIONAL CORP
发明人
NEIL HOOVER AKKERMAN
分类号
E21B23/02;(IPC1-7):E21B23/00
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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