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经营范围
发明名称
PROTECTIVE SLEEVE FOR DRILL PIPE
摘要
申请公布号
RO105236(B1)
申请公布日期
1992.11.01
申请号
RO19880132341
申请日期
1988.02.25
申请人
BURCEA D. CONSTANTIN;GAL G. VIOREL;HILOTE V. IOAN
发明人
BURCEA D. CONSTANTIN;GAL G. VIOREL;HILOTE V. IOAN
分类号
E21B17/10;E21B17/12
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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