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公开(公告)号：US3491220A
公开(公告)日：1970-01-20
申请号：US3491220D
申请日：1968-03-05
Applicant: UNITED CARR INC
Inventor： MITCHELL EDWARD B , FELTON PHILIP R
CPC classification number: H01H13/60 , H01H13/023
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