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经营范围
发明名称
Valveless sand pump
摘要
申请公布号
US2151059(A)
申请公布日期
1939.03.21
申请号
US19370141336
申请日期
1937.05.07
申请人
TOWNE LELAND J;DE LOE EDGAR B
发明人
TOWNE LELAND J.;LOE EDGAR B. DE
分类号
E21B27/00
主分类号
E21B27/00
代理机构
代理人
主权项
地址
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