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发明名称
Means for installing and removing flow valves or the like
摘要
申请公布号
US2679903(A)
申请公布日期
1954.06.01
申请号
US19490129001
申请日期
1949.11.23
申请人
SID W. RICHARDSON INC.
发明人
JR. HAROLD E. MCGOWEN,;JR. HOWARD H. MOORE,
分类号
E21B23/03
主分类号
E21B23/03
代理机构
代理人
主权项
地址
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