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发明名称
VAGLIO PER SABBIA CON TUBO DI BASE A TAPPI PER CONTROLLO DELLA SABBIA.
摘要
申请公布号
IT1271475(B)
申请公布日期
1997.05.28
申请号
IT1993MI02061
申请日期
1993.09.27
申请人
HALLIBURTON COMPANY
发明人
RESTARICK HENRY L.
分类号
E21B43/08;E21B43/11;(IPC1-7):E21D
主分类号
E21B43/08
代理机构
代理人
主权项
地址
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