冷却期间 meaning in Chinese

cooling-off period

Normal expansion and contraction of metal parts during periods of heat - up and cool - down
在加热或冷却期间，金属配件的正常膨胀和收缩。
During casting and especially during cool - down all conditions shall be observed which are apt to minimize the residual stresses of the castings
在铸造期间,特别是在冷却期间,留意易使铸件残余应力减到最少的所有条件/状态