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公开(公告)号：US3448428A
公开(公告)日：1969-06-03
申请号：US3448428D
申请日：1967-10-23
Applicant: GLORIA EICHMILLER , STACKPOLE CARBON CO
Inventor： BANG MOGENS W , HANSON EARL A , EICHMILLER FREDERICK E
CPC classification number: H01C10/32
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