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发明名称
BEARING FOR ROTARY VACUUM PUMPS
摘要
申请公布号
CA317426(A)
申请公布日期
1931.11.24
申请号
CAD317426
申请日期
申请人
THE DE LAVAL SEPARATOR COMPANY
发明人
CYRUS H. HAPGOOD
分类号
主分类号
代理机构
代理人
主权项
地址
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