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经营范围
发明名称
Subsurface sampler
摘要
申请公布号
US2625226(A)
申请公布日期
1953.01.13
申请号
US19470791281
申请日期
1947.12.12
申请人
ENGINEERING LABORATORIES, INC.
发明人
WOFFORD CUSTER A.
分类号
E21B49/08
主分类号
E21B49/08
代理机构
代理人
主权项
地址
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