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公开(公告)号：US3033962A
公开(公告)日：1962-05-08
申请号：US73170658
申请日：1958-04-29
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： EDMUND FRIEDRICH ROBERT , LINGAL HARRY J
IPC: H01H33/56 , H01H33/82 , H01H33/825
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