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公开(公告)号：US2970822A
公开(公告)日：1961-02-07
申请号：US66551757
申请日：1957-06-13
Applicant: BERNARD KRIEGEL
Inventor： FRED ERNEST
CPC classification number: F02M3/08 , F02M1/00 , F02M2700/4311 , Y10S261/38 , Y10T137/87121 , Y10T137/87853
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