该公司的60个雇员生产空气幕——这是安装在天花板上的矩形鼓风机，可以将热风或冷风，昆虫和灰尘拒之在外达到调温的功能。
The company's 60 employees make air curtains - rectangular blowers mounted on the ceiling that keep out hot or chilly air, insects and dust while keeping in air-conditioning and heat.
热风由功率强大的鼓风机通过热风总管、环形风管、风口小弯管、直吹管和风口不断鼓人高炉。
The hot air is always carried to the furnace by a powerful turboblower, through the hot blast main, bustle pipe, bootleg, blowpipe and tuyere.
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