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发明名称
Valve operator
摘要
申请公布号
US3324741(A)
申请公布日期
1967.06.13
申请号
US19650464070
申请日期
1965.06.15
申请人
ACF INDUSTRIES, INCORPORATED
发明人
ANDERSON CLIFFORD E.
分类号
E21B33/06;E21B34/02;E21B34/04;E21B34/06;F16K31/04;F16K31/05
主分类号
E21B33/06
代理机构
代理人
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