The Tomb-sweeping Day is generally not cook food, only eat coldrun cake, which is the source of the cold food festival.
清明节当天一般是不煮食物，只吃冷的润饼，这是源于寒食节的习俗。
2
Although the engine of the new car before the factory has gone through the coldrun, but this is still not running in place to replace the actual running.
虽然新车的发动机在出厂前都经过了“冷磨合”，但这种磨合仍是不能够替代实际运用时的磨合。
3
Based on a turboshaft engine test data gathered during coldrun, a method of calculating engine resistant torque and torque for acceleration was introduced.