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发明名称
Flow choke
摘要
申请公布号
US2625179(A)
申请公布日期
1953.01.13
申请号
US19460690281
申请日期
1946.08.13
申请人
ROBERTSON MARION A;SANDERS JAMES C
发明人
ROBERTSON MARION A.;SANDERS JAMES C.
分类号
E21B34/02;F16L55/027
主分类号
E21B34/02
代理机构
代理人
主权项
地址
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