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公开(公告)号:US2881909A
公开(公告)日:1959-04-14
申请号:US68867957
申请日:1957-10-07
Applicant: PHILIPS CORP
Inventor: BERNARDUS FRANSEN JAN JOSEPHUS
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公开(公告)号:US2881909A
公开(公告)日:1959-04-14
申请号:US68867957
申请日:1957-10-07
Applicant: PHILIPS CORP
Inventor: BERNARDUS FRANSEN JAN JOSEPHUS