英语词汇550 mm a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

英汉双解词典包含2273206条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

单词	550 mm a
释义	mm noun— 毫米 n
随便看	low energy density low energy design low energy downlighter low energy environment low-energy equipment low-energy filtration low energy food low-energy ions low-energy laser low energy levels low energy light bulbs low energy lighting low-energy loss low-energy modes low-energy operation low energy production low energy products low-energy requirements low energy solutions low energy source low energy system low energy technologies low energy usage low energy use low engagement

mm noun—