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发明名称
KLEMME.
摘要
申请公布号
NO167821(C)
申请公布日期
1991.12.11
申请号
NO19850000979
申请日期
1985.03.12
申请人
WALMSLEY, OWEN;EMMETT, ROBERT
发明人
WALMSLEY, OWEN
分类号
E21B19/06;E21B19/07;E21B19/10;E21B31/18;E21B31/20;F16B2/16;F16B7/04;F16B7/14;F16B21/10;F16L3/00;F16L37/092;F16L37/23;(IPC1-7):E21B19/10
主分类号
E21B19/06
代理机构
代理人
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