The drag of cooling system will become bigger with the increase of speed of fan when the speed of car is constant and the drag of radiator is sensitive to speed of fan.
当风扇转速一定时，冷却系统阻力随车速的增大而增大，冷凝器阻力对车速变化比较敏感。
Ltd are introduced. The system of vibration control, withdrawal drag control, dummy ingot follower and cooling water control are described.
对结晶器振动控制系统、拉矫拖动控制系统、引锭跟踪系统、冷却水系统系统做了概括的叙述。
In the Thielert approach, he says, the radiator is under the engine cowling, which leads to low cooling efficiency and more drag, because of too small a radiator and poor ducting.
他说，在Thielert发动机设计方案中，散热器位于发动机整流罩下方，这导致散热效率低下，阻力增加，因为它的散热器太小了，而通风量有不足。
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