英语词汇“principal secondary focal length”的中英文释义、用法、翻译及短语词组-英汉翻译词典

单词	principal secondary focal length
释义	principal secondary focal length 英?[?prins?p?l ?sek?nd?ri ?f??k?l le?θ] 美?[?pr?ns?p?l ?s?k?n?d?ri ?fok?l l??kθ] 释义 [医]后主焦距，后焦距
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