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发明名称
BUJAO PARA VEDAR TEMPORARIAMENTE O INTERIOR DE UM MEMBRO ANULAR
摘要
申请公布号
BR7805475(A)
申请公布日期
1979.05.08
申请号
BR19780005475
申请日期
1978.08.23
申请人
HALLIBURTON CO
发明人
KNOX L
分类号
E02B17/02;F16K7/20;F16L55/11;F16L55/132;(IPC1-7):F16J15/06
主分类号
E02B17/02
代理机构
代理人
主权项
地址
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