“通风机”造句

矿井中用钢制通风机来保持空气流通。
The pit is ventilated by a steel fan.

螺旋式通风机从壁孔中排出空气.
Propeller fans exhaust air through holes in the wall.

窗上的通风机发出了耳语般轻微的嗡嗡声.
The fan at the window made a small whispering roar.