The aerodynamic shape design of train head should consider all kinds of factors because the relation between reducing aerodynamic drag and airpressure pulse may be conflictive and uniform.
减小列车空气阻力和降低列车交会压力波，既矛盾又统一，列车气动头部外形设计需要综合考虑各种因素。
2
The recuperators have high air resistance , low air preheating temperature and high fan pressurehead , and fan has much noise to environment and are apt to break down with vibration .
此换热器空气阻力大，空气预热温度不高，风机压头高，环境噪声大，风机振动大、易损坏。
3
Inspection airpressure test(with water head) for No1. water ballast tank(No15 block).