英语词汇patent log怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	patent log
释义	patent logn.Nautical（名词）【航海】 A torpedo-shaped instrument with rotary fins that is dragged from the stern of a vessel to measure the speed or distance traveled. Also called screw log ,taffrail log 尾航拖曳式计程仪：一种鱼雷状仪器，带有转子，拖在船尾用来测量行速或航行距离也作 screw log,taffrail log
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