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公开(公告)号：US3108771A
公开(公告)日：1963-10-29
申请号：US63639757
申请日：1957-01-25
Applicant: SERVO CORP OF AMERICA
Inventor： PELLINO WILLIAM M , GALLAGHER CORNELIUS A
CPC classification number: B61L23/163 , B61L23/12
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