Hydraulic lifting upside-down method is advanced for the internal steel stacks' installation, and it was firstly invented inland.
液压提升倒装法是一种先进的多管式烟囱钢内筒安装方法，属国内首创。
This method depends on determining the change in stress distribution within the model when it is turned upside down.
倒置法的依据是在模型倒置时测定模型内应力分布的变化。
How he's able to control the sand so perfectly is anyone's guess, it certainly puts my traditional upside down bucket method to shame.
无人知道他是如何如此精准的控制沙子的，反正肯定是以超乎想象的办法。
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