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经营范围
发明名称
PITLESS WELL SYSTEM
摘要
申请公布号
US3519073(A)
申请公布日期
1970.07.07
申请号
USD3519073
申请日期
1968.03.22
申请人
SHETLER PUMP CO. INC.
发明人
EARL B. SHETLER
分类号
E21B33/00;(IPC1-7):E21B33/03
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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