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发明名称
Pipeline blocking device and process for its use
摘要
申请公布号
US3381714(A)
申请公布日期
1968.05.07
申请号
US19650467896
申请日期
1965.06.29
申请人
MARATHON OIL COMPANY
发明人
JOHNSON IRVIN D.
分类号
F16L55/10;F16L55/128;G01M3/00
主分类号
F16L55/10
代理机构
代理人
主权项
地址
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