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发明名称
PISTON ADAPTED TO BE PUMPED ALONG A FLUID FLOW CONDUCTOR
摘要
申请公布号
GB1592781(A)
申请公布日期
1981.07.08
申请号
GB19770037262
申请日期
1977.09.07
申请人
OTIS ENG CORP
发明人
分类号
B08B9/057;E21B23/10;(IPC1-7):F16L55/00;E21B23/08
主分类号
B08B9/057
代理机构
代理人
主权项
地址
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