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发明名称
Intermittent flow device
摘要
申请公布号
US2202549(A)
申请公布日期
1940.05.28
申请号
US19390277828
申请日期
1939.06.07
申请人
DONALDSON FRANK Y
发明人
DONALDSON FRANK Y.
分类号
A01G25/16
主分类号
A01G25/16
代理机构
代理人
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地址
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