The epidemic is ruthless and lives at home. Are you "house" or "abandoned house"? They are all at home, but the results of "house" and "abandoned house" are different.It is said that the house is to live in the house, but it is only after the tide has faded that who knows who is really swimming.
For the sliding vane rotary vacuum pump, It has the advantages of compact structure, small size, light weight, low noise and small vibration. Therefore, it is suitable for use as a backing pump, and is more suitable for supporting precision instruments and laboratory use. For example: vacuum oil pur
As the world is facing the problems of environment and energy, and these two problems have become increasingly serious, and have become the problems that all countries have to solve. As a large developing country, China is also facing a very serious problem of the environment and energy. Chongqing