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发明名称
High vacuum system with recirculating conduit
摘要
申请公布号
US2636655(A)
申请公布日期
1953.04.28
申请号
US19480065400
申请日期
1948.12.15
申请人
PHOTOSWITCH, INCORPORATED
发明人
MCFEE RAYMOND H.
分类号
H01J9/38
主分类号
H01J9/38
代理机构
代理人
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地址
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