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公开(公告)号:US2922986A
公开(公告)日:1960-01-26
申请号:US58034056
申请日:1956-04-24
Applicant: BELL TELEPHONE LABOR INC
Inventor: CHYNOWETH ALAN G
公开(公告)号:US2922986A
公开(公告)日:1960-01-26
申请号:US58034056
申请日:1956-04-24
Applicant: BELL TELEPHONE LABOR INC
Inventor: CHYNOWETH ALAN G