英语词汇optic sign是什么意思，optic sign的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典

单词	optic sign
释义	optic sign　 [矿]光性符号
随便看	over current trip over cutting over cutting over damping over development over dose over drive over drive clutch pawl over drive shaft over drive stationary gear over due accounts over easy over enzyme bating over estimate over etching over excitation over excitation region over exposure over flow over flow well over foul line over great distances over great distances over head and ears over head and ears

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