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hovering ceiling ['hɔv(ə)rɪŋ 'si:lɪŋ]
avia. 悬停升限; 直升机静升限
 English thesaurus
hovering ceiling ['hɔv(ə)rɪŋ 'si:lɪŋ]
mil., logist. The highest altitude at which the helicopter is capable of hovering in standard atmosphere. It is usually stated in two figures: hovering in ground effect and hovering out of ground effect. (FRA)