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1.发明授权
公开(公告)号：US3319149A
公开(公告)日：1967-05-09
申请号：US38560164
申请日：1964-07-28
Applicant: COLE E K LTD
Inventor： START JAMES D M
CPC classification number: H02H3/52 , D06M14/00 , D06M14/18 , H02H7/1227
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