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公开(公告)号：US3631281A
公开(公告)日：1971-12-28
申请号：US3631281D
申请日：1970-04-30
Applicant: MACHLET LAB INC THE
Inventor： RANDMER JACOB A
CPC classification number: H01J21/18 , H01J23/005
Abstract: An electron discharge device of the magnetic beam type which employs magnetic field extending means enabling the device to be provided with air-cooling features while reducing the magnetic gap.
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