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公开(公告)号：US2017131A
公开(公告)日：1935-10-15
申请号：US59775032
申请日：1932-03-09
Applicant: RCA CORP
Inventor： KLAAS POSTHUMUS , JOSEPHUS WEIJERS THEODORUS
IPC: H03H7/01
CPC classification number: H03H7/0161
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