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发明名称
Vacuum operated apparatus for moving fluid material
摘要
申请公布号
US2913120(A)
申请公布日期
1959.11.17
申请号
US19570648556
申请日期
1957.03.26
申请人
发明人
分类号
A47L5/18;A47L7/00
主分类号
A47L5/18
代理机构
代理人
主权项
地址
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