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发明名称
BORING RAM
摘要
申请公布号
US5056608(A)
申请公布日期
1991.10.15
申请号
US19900543728
申请日期
1990.08.07
申请人
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人
HEMMINGS, KENNETH
分类号
E21B4/14
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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