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公开(公告)号：US3445750A
公开(公告)日：1969-05-20
申请号：US3445750D
申请日：1966-10-17
Applicant: UTHE TECHNOLOGY
Inventor： UTHE PAUL M JR , WRIGHT LOREN G , GREENAN RICHARD E
CPC classification number: H03F1/34 , B06B1/0253 , Y10T307/461
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