This paper is based on the theory of gas dynamics, by means of improving the first nozzle ofdiffusion pump in order to increase the pumping speedofdiffusion pump are reported in the paper.
本文以气体动力学理论为基础，论述了如何通过改进扩散泵的第一级喷咀来提高扩散泵的抽气速率。
2
Thompson used diffusion imaging, which measures the direction in which water diffuses through white matter, to show the speedof the connections.
汤普森利用扩散方法成像，他控制水通过白质扩散的方向，显示大脑连接的速度。
3
The calculation accuracy ofdiffusionspeed in whole-space electromagnetic field affects directly the interpretative precision of TEM survey in underground coal mines.