英语词汇flat back four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	flat back four
释义	flat back four 简明释义（足球比赛中）四名防守员平行站位双语例句 1 The framework of the long-stroke pumping unit with compound crown sheave consists of a flat frame with four columns, two cantilever beams and two back legs. 复合天轮式长冲程抽油机主架由四柱扁框架、两个悬臂梁和两个后支腿组成。
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