英语词汇“position light signal”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	position light signal
释义	position light signal noun : a fixed railroad signal that gives its indications by varying the positions of two or more lights
随便看	threading machine threading tool thread lace threadle threadleaf threadleaf threadleaf sedge threadleaved threadleaved threadleaved sedge thread-legged bug threadless threadlet threadlike thread-line fishing thread lungworm thread miller thread-needle thread of life thread paper thread roller threads threads thread-the-needle thread-waisted wasp

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