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发明名称
APERFEICOAMENTO EM UM POCO SUBTERRANEO,APARELHAGEM DE SERVICO EM POCO PARA TRATAMENTO DE UMA FORMACAO PRODUTIVA E COMBINACAO
摘要
申请公布号
BR8804837(A)
申请公布日期
1989.04.25
申请号
BR1988PI04837
申请日期
1988.09.19
申请人
OTIS ENGINEERING CORPORATION
发明人
RICHARD M. SPROUL;FRANK GIUSTI, JR.;CARTER R. YOUNG;JOHN B. WILKIE, JR.
分类号
E21B23/06;E21B33/1295;E21B43/04;(IPC1-7):E21B23/06
主分类号
E21B23/06
代理机构
代理人
主权项
地址
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