英语词汇Back Up 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	Back Up Ventilation
释义	Back Up Ventilation 翻译后备通风以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译网络释义短语 1 back-up ventilation 备用通气双语例句 1 The calculation models are set up on average speed and Max speed in back field and jet effect distance, new theoretical reference is provided for effective ventilation in heading fa. 给出了回流区平均速度、最大回流速度及射流作用距离的计算模型，为掘进工作面合理有效通风提供了新的理论依据。
随便看	degree of determination degree of deviation degree of differential equation degree of differentiation degree of difficulty degree of dilution degree of dip degree of disability degree of disablement degree of discoloration degree of discolouration degree of disorder degree of dispersion degree of dispersity degree of dissection degree of dissociation degree of distortion degree of distortion in service degree of distributive mixing degree of disturbance degree of divisor degree of divisor class degree of dominance degree of draft degree of drainage

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