In the rock column on the man-built brick tower, according to legend is the Liao Dynasty Muta, have elapsed since the years of history, is the Chengde oldest buildings.
在岩柱上有人工建造的砖塔，相传是辽代墓塔，距今已有千年历史，是承德地区现存最古老的建筑。
2
A distillation tower in which a rectifying column is used.
有一个精馏柱的蒸馏塔。
3
The atomization effectiveness of a liquid column in a liquid-column impingement tower has a direct influence on the desulfurization efficiency of a whole system.