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公开(公告)号：US2397520A
公开(公告)日：1946-04-02
申请号：US48323943
申请日：1943-04-16
Applicant: ARMSTRONG JAMES F
Inventor： ARMSTRONG JAMES F
CPC classification number: F02M7/20 , F02M7/08 , F02M17/04 , Y10T137/0777
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