管路输沙试验中观察到管路底部出现滑动底床的现象。
Sliding bed has been observed in our experiments of hydrotransport.
说明底部有一个“作用流速”，才产生底床的冲刷与淤积。
It is assumed that there is an "effective bed velocity" on the bottom which determines the erosion and deposition of the bed.
底床一定要设置好，这对于无CO2添加的缸来说至关重要。
Set up the substrate well, this is the main part of the non CO2 tank.
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