“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	matrix iterative analysis matrix kernel matrix lens matrix logarithm matrix manifold matrix manipulation matrix mechanics matrix method matrix minimal polynomial matrix model matrix modifier matrix monotone function matrix multiparticulate sustained release preparations matrix multiplication matrix-multiplication exponent matrix multisplitting method matrix norm matrix normal distribution matrix notation matrix number matrix of a bilinear form matrix of a formula matrix of a linear transformation matrix of a quadratic form matrix of coefficients

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