英语词汇“concave grating”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	concave grating
释义	concave grating noun : a reflection grating ruled on a concave mirror
随便看	stepping stone stepping stones stepping up stepping-off place stepping-stone stepping-stones steppingstones steprelationships steps steps (along) steps (on) steps along steps aside steps aside (from) steps aside from steps back steps down steps down (from) steps down from steps forward steps in steps into steps on steps on it steps out

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concave grating