absolute ceiling
(aviation) The maximum altitude above sea level that an aircraft or missile can maintain horizontal flight under normal conditions.
Alternative form of random access memory
plural of half-smile
(Internet slang) Initialism of in my point of view.
試験飛行中、その航空機は通常の条件下で水平飛行を維持できる最大の海抜高度に達し、操縦士はやむなく徐々に降下を始めた。
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