Fuel economizer is placed on the back part of the boiler.省煤器布置在锅炉后部.Represents the control discrimination methods of air economizer and their applicability.给出了空气节能器的判别控制方法及各方法的适用地区.Economizer leakage is a main problem in...
Agassi hit a backhand...阿加西反手一击。Her backhand, however, had definitely improved.不过她的反手球的确有了进步.You like to take backhand crosscourt and to run around and hit forehands off second serves.你喜欢打反手穿越,大范围跑动然后正手接二发.She practised ...