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经营范围
发明名称
Well packers
摘要
申请公布号
US2715442(A)
申请公布日期
1955.08.16
申请号
US19510258166
申请日期
1951.11.26
申请人
BROWN CICERO C
发明人
BROWN CICERO C.
分类号
E21B33/129
主分类号
E21B33/129
代理机构
代理人
主权项
地址
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