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经营范围
发明名称
Sand flusher
摘要
申请公布号
US2526086(A)
申请公布日期
1950.10.17
申请号
US19450623331
申请日期
1945.10.19
申请人
SANDERS JOSEPH O
发明人
SANDERS JOSEPH O.
分类号
E21B37/00
主分类号
E21B37/00
代理机构
代理人
主权项
地址
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