Apparatus for testing the operation of oxygen supply equipment for aircraft |
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申请号 | US60988045 | 申请日 | 1945-08-09 | 公开(公告)号 | US2457713A | 公开(公告)日 | 1948-12-28 |
申请人 | ROY OSBORNE RONALD; GRAHAM DUNSFORD ERNEST; | 发明人 | ROY OSBORNE RONALD; GRAHAM DUNSFORD ERNEST; | ||||
摘要 | |||||||
权利要求 | |||||||
说明书全文 |