vacuum pump used to obtain a high vacuum

gonghua brand series diffusion pump oil is the work fluid used by metal diffusion pumps and glass diffusion pumps in the process of vacuum pumping.

巩华牌系列扩散泵油是金属扩散泵及玻璃扩散泵真空抽气时使用的工作液。

this paper is based on the theory of gas dynamics, by means of improving the first nozzle of diffusion pump in order to increase the pumping speed of diffusion 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。

a glass-made diffusion pump unit as a physical model of vacuum system was provided for those college students who only major science.

为不熟悉工程实际的理科学生设计制造了玻璃制扩散泵真空系统实物模型，使其直观地了解真空获得、测量和检漏的工作原理。

therefore, it applies to diffusion pump for the pre-pump, but also for supporting precision instruments and laboratory use.

所以，它适用于作扩散泵的前级泵，而且更适用于精密仪器配套和实验室使用。

the device is equipped with a cryogenic pump, an oil diffusion pump and a mechanical pump.

该机抽气系统由低温泵、扩散泵和机械泵组成。

it reveals the essence of the backstreaming of diffusion pump and provides a theoretical basis for reducing the backstreaming of diffusion pump.

揭示了扩散泵返流的实质，为减少扩散泵返流提供了理论依据。

in this paper, the cause of speed of kt-150 diffusion pump are analyzed in the construction with using the theory of aerodynamics.

本文运用气体动力学的理论，重点从结构上分析了影响kt-150型扩散泵的抽速因素。