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发明名称
Improvements in and relating to vacuum-producing apparatus
摘要
申请公布号
GB450209(A)
申请公布日期
1936.07.13
申请号
GB19360001967
申请日期
1936.01.21
申请人
ALFRED REINHOLD JAHN
发明人
分类号
F04F5/22
主分类号
F04F5/22
代理机构
代理人
主权项
地址
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