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公开(公告)号：US2933676A
公开(公告)日：1960-04-19
申请号：US50653455
申请日：1955-05-06
Applicant: VICTOREEN INSTR COMPANY
Inventor： STOKES ARTHUR J , REUTER JR FREDERIC W
IPC: G01L21/30
CPC classification number: G01L21/30
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公开(公告)号：US2864023A
公开(公告)日：1958-12-09
申请号：US60555656
申请日：1956-08-22
Applicant: VICTOREEN INSTR COMPANY
Inventor： STOKES ARTHUR J , REUTER JR FREDERIC W
IPC: H01J17/22
CPC classification number: H01J17/22
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