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发明名称
DISPOSICION DE GUARNICION O COJINETE PARA EJE GIRATORIO PREFERIBLEMENTE PARA SER USADO EN UN POZO
摘要
申请公布号
AR227081(A1)
申请公布日期
1982.09.15
申请号
AR19820288062
申请日期
1982.01.08
申请人
YOUNG DAVID E
发明人
分类号
E21B4/02;E21B4/00;E21B21/00;F16J15/16;F16N11/10;F16N39/06;(IPC1-7):F16C33/66
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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