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minimum descent altitude [‘mɪnɪmem dɪ’sent ˈæltitju:d]
avia.	最低下降高度; 仪表下降最低高度; 最低决断高度
English thesaurus
minimum descent altitude [‘mɪnɪmem dɪ’sent ˈæltitju:d]
avia., amer.	The altitude above sea level ASL specified in the Canada Air Pilot CAP or the route and approach inventory for a non-precision approach, below which descent shall not be made until the required visual reference to continue the approach to land has been established
Minimum Descent Altitude [‘mɪnɪmem dɪ’sent ˈæltitju:d]
abbr., scottish	MDA