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公开(公告)号：US3148289A
公开(公告)日：1964-09-08
申请号：US84200059
申请日：1959-09-24
Applicant: PHILIPS CORP
Inventor： JOSEPHUS PIJLS HERMANUS STEPHA , ERNST ENZ ULRICH
CPC classification number: H03H3/013 , B06B1/0261 , B06B2201/55 , B06B2201/58
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