英语词汇downward ventilation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	downward ventilation
释义	downward ventilation 简明释义下行通风，向下通风网络释义短语 1 downward ventilation system 从底板排出的通风系统 2 downward system of ventilation 下向通风系统 3 downward d ventilation 下向通风双语例句 1 The stope downward ventilation technique has been used under different conditions in many places of our country. 回采工作面下行通风在我国许多地方的不同条件下均有使用。 2 However, when the fire happens, the downward ventilation can often cause the air disorder and air inversion easily. 但下行通风在发生火灾时往往会引起风流紊乱，容易造成风流逆转。
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