Welded sections will also have locked-in stress owing to a combination of differential heating and cooling cycles as well as to changes in cross section.
焊接面将也有锁紧力，这是因为不同的加热和冷却的循环以及结合面的变形。
2
Then this paper simplified the differential eguation contraposing the cooling tower which is a special structure, and adopted the power series method to solve the differential eguation.
随后针对冷却塔这个特殊结构，把微分方程进行了简化，并且采用幂级数解法解答出自振微分方程。
3
These different cooling histories may reflect the differential uplifting of Qinling orogeny belt.