“step-by-step variable speed transmission ”的概念、定义、习题解题方法及翻译-物理辞典

单词	step-by-step variable speed transmission
释义	step-by-step variable speed transmission 多级变速传动装置
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物理辞典收录了32164条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。