So the cascade multilevel inverters have been used in many industrial application fields such as fan or pump and the good saving-energy effect has been gotten.
采用模块化安装，易于扩展和维修，并具有冗余功能。现已广泛应用于风机、泵类负载调速场合，取得很好的节能效果。
The use of computers in industry has brought about remarkable changes in productivity. The application of computer in the industrial fields has resulted in surprising changes in productivity.
计算机在工业领域的应用使生产效率发生了惊人的变化。
The measurements of the relative concentration of the small particle group have a wide application prospects in the fields of atmosphere, industrial burners, chemical factories and fire science.
微小颗粒场相对浓度的测量在大气、工业炉、化工厂及火灾研究等领域有着广阔的应用前景。
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