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发明名称
Vacuum pumping system
摘要
申请公布号
US1935415(A)
申请公布日期
1933.11.14
申请号
US19320633475
申请日期
1932.09.16
申请人
GENERAL ELECTRIC COMPANY
发明人
READ JOHN C.
分类号
F04F9/00
主分类号
F04F9/00
代理机构
代理人
主权项
地址
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