英语词汇principal etched zone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3607232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	principal etched zone
释义	principal etched zone
随便看	flight chain conveyer flight chain conveyor flight channel flight channel volume flight characteristic flight characteristics flight characteristics test flight chart flight check flight check criterion flight class flight clearance flight clothing flight command indicator flight communication center flight compartment Flight Computer flight condition flight connections flight control area flight control computer flight control digital computer flight control display flight control electronic control panel flight control electronics