英语词汇vertical shaft development system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	vertical shaft development system
释义	vertical shaft development system 简明释义竖井开拓网络释义 1 ?竖井开拓竖井开拓
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英汉双解词典包含3185865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。