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公开(公告)号：US2658131A
公开(公告)日：1953-11-03
申请号：US32201852
申请日：1952-11-22
Applicant: PHILIPS LAB INC
Inventor： HAMACHER EDWARD A , KURT LOWITZSCH
IPC: H01C10/24
CPC classification number: H01C10/24
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