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公开(公告)号：US2190653A
公开(公告)日：1940-02-20
申请号：US5465735
申请日：1935-12-16
Applicant: O N DAVIES
Inventor： DUNN ANDREW C
CPC classification number: E05F5/10 , E05F15/50 , E05Y2201/21 , E05Y2201/256 , E05Y2201/264 , E05Y2400/445 , Y10T16/27 , Y10T16/2793
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