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发明名称
Screening device
摘要
申请公布号
US2112886(A)
申请公布日期
1938.04.05
申请号
US19350009977
申请日期
1935.03.08
申请人
GREENAWALT JOHN E
发明人
GREENAWALT JOHN E.
分类号
B03B9/06;E03F5/14
主分类号
B03B9/06
代理机构
代理人
主权项
地址
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