The investigation on hydrodynamics & heat transfer in the bottomzone in circulating fluidized beds (CFBs) is of importance for engineering applications.
循环流化床（CFB）底部区流动与传热特性的研究是一个具有十分重要的工程背景的课题。
2
Particularly in big storage tanks or towers, the outpumping stock quality is difficult to control-especially when the stock is diluted in the bottomzone of the tank.
特别对于大型储罐或塔来讲，输出的浆料质量很难控制——尤其是浆料在罐底被稀释后。
3
Mimas, at the upper right, has an enormous impact crater on one side, and Tethys, at the bottom, has a huge rift zone called Ithaca Chasma that runs nearly three-quarters of the way around the moon.