“ventilation shaft”的概念、定义、翻译、参考文献-科学参考

单词	ventilation shaft
释义	ventilation shaft Encyclopedia 工学竖井释 ventilation shaft；air shaft通风井用于地下矿山新鲜风流进入井下或污风排出的井筒。保证将足够数量的新鲜空气连续供给井下各采掘作业面，并将污浊空气从矿井中排出，防止矿井内大气污染，创造安全舒适的井下作业环境。简称风井。
随便看	countertransference counter transport countertube counter-twilight counter-urbanization countervailing power countervailing principle counter weight counterweight counter weight arm counting counting complexity counting constant counting cup counting efficiency counting fractions over 1/2 as one and disregarding the rest counting fractions over 1/2 as one and disregarding the rest; rounding; half adjust counting function counting generalized principle counting inspection counting labeled tree counting machine counting measure counting method of viable bacteria counting number

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