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发明名称
Pressure-proportioning device
摘要
申请公布号
US2959225(A)
申请公布日期
1960.11.08
申请号
US19580714140
申请日期
1958.02.10
申请人
JERSEY PRODUCTION RESEARCH COMPANY
发明人
ROBERTS ALAN P.
分类号
E21B33/124
主分类号
E21B33/124
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代理人
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