It is obvious th at A. C. motors are superior to D. C. motors in many appli cations.
显然，交流电机在许多应用场合比直流电机优越。
Nonwoven material is one of important covers in agricultural appli cation. Evaporation of water through the material involves mechanism of complex thermo-mass transport.
非织造纤维材料是农业上用作覆盖物的一种重要材料，水分经这一材料蒸发时，涉及到复杂的热质同时传递现象。
[GUO Xianguang. Appli-cation of improved entropy method in evaluation of economic res ult[J]. System Engineering Theory&Practice, 1998, (12):98~102. ].
[10]郭显光。改进的熵值法及其在经济效益评价中的应用[J]。系统工程理论与实践，1998，（12）：98~102。
[GUO Xianguang. Appli-cation of improved entropy method in evaluation of economic res ult[J]. System Engineering Theory&Practice, 1998, (12):98~102. ].
[10]郭显光。改进的熵值法及其在经济效益评价中的应用[J]。系统工程理论与实践，1998，（12）：98~102。
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