求翻译：对于搅拌器的临界转速，流体的存在增大了其临界转速，且流体介质的密度搅拌轴的临界转速影响不是很大，但是安装高度对其影响非常显著。是什么意思？

For the critical stirrer speed, the presence of fluid increases its critical speed, and density of the fluid medium mixing shaft critical speed impact is not great, but the installation height of its influence is very significant.

The threshold for stirrer speed, fluid presence has increased its critical speed and flow medium density mixing shaft is not a very big impact on the critical speed, but installation height of its impact has been very significant.

Regarding the mixer critical rotation speeds, the fluid existence has increased its critical rotation speeds, also the fluid medium density agitation axis critical rotation speeds influence is not very big, but installs extremely is highly remarkable to its influence.

Critical speed of agitator, increasing the critical speed of the fluid, and fluid density effects mixing shaft critical speed is not very large, but the effect is highly significant.

As to the critical rotational speed of the agitator, the existence of the fluid has increased its critical rotational speed, and fluid density of medium no very much loud in influence in critical rotational speed to stir axle, it is very prominent that it influences it but install the height.