More severe cases may be treated with a CPAP machine, so named because they maintain constant positive air pressure to the wind pipe to help users breathe easy at night.

严重一点的患者可能就得用CPAP机来治疗了，人们给它取这个名字是因为它能够给气管提供稳定的空气压力，借以帮助患者在夜间呼吸。

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The multistage powder selecting machine comprises a shell, a motor, a rotor, wind guide blades, cyclone cylinders, a feeding pipe and a wind converging pipe;

包括壳体、电机、转子、导风叶片、旋风筒、进料管和汇风管；

youdao

The multistage powder selecting machine comprises a shell, a motor, a rotor, wind guide blades, cyclone cylinders, a feeding pipe and a wind converging pipe;

包括壳体、电机、转子、导风叶片、旋风筒、进料管和汇风管；

youdao