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发明名称
LOCK BIT
摘要
申请公布号
JPS62178688(A)
申请公布日期
1987.08.05
申请号
JP19860315921
申请日期
1986.12.29
申请人
HUGHES TOOL CO
发明人
ROBAATO AARU GURAIMUSU
分类号
E21B10/18
主分类号
E21B10/18
代理机构
代理人
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地址
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