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公开(公告)号：US3078550A
公开(公告)日：1963-02-26
申请号：US82278459
申请日：1959-06-25
Applicant: SPECIALTIES DEV CORP
Inventor： RAKOWSKI ALEXANDER J
IPC: H01C7/04
CPC classification number: H01C7/04 , Y10T29/49087 , Y10T29/49099
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