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发明名称
Evacuating apparatus
摘要
申请公布号
US2791245(A)
申请公布日期
1957.05.07
申请号
US19550521487
申请日期
1955.07.12
申请人
ALCOTT DAVID W
发明人
ALCOTT DAVID W.
分类号
H01J9/385
主分类号
H01J9/385
代理机构
代理人
主权项
地址
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