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发明名称
Quick-change slush nozzle
摘要
申请公布号
US2519648(A)
申请公布日期
1950.08.22
申请号
US19470793197
申请日期
1947.12.22
申请人
REED ROLLER BIT COMPANY
发明人
GOOLSBEE CHARLES C.
分类号
E21B10/18
主分类号
E21B10/18
代理机构
代理人
主权项
地址
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