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1.发明授权
公开(公告)号：US3302990A
公开(公告)日：1967-02-07
申请号：US43886865
申请日：1965-03-11
Applicant: GEN ELECTRIC
Inventor： KURTZ DONALD R , JAMES VERAS DEMOCRITOS
IPC: H01H33/668 , H01J7/18
CPC classification number: H01H33/6683 , H01J7/18 , H01J7/186
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