The wind smothered the houses with dust. 大風颳起的塵土覆蓋了房子。
An air curtain was designed according to the jet theory of fluid mechanics and the role and feature of air curtain to separate dust in a fully mechanized face. 根據流體力學射流理論，分析了空氣幕在綜采工作面隔離粉塵的作用，並根據綜采工作面應用空氣幕隔塵的特點，設計了空氣幕。
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