又大又粗又爽60分钟免费观看,亚洲国产精品久久久久性色AV ,性一交一乱一乱一时一频,一二三四视频社区在线一中文

Dry screw vacuum pump production sales
Product service hotline: 0631 - 8187861
Index > English > KNOWLEDGE >
30日
2020.12
Overview of dry vacuum pumps
Dry mechanical vacuum pump (hereinafter referred to as dry mechanical pump) refers to the pump from the atmospheric pressure to start pumping gas, and can be pumped directly into the atmosphere, there is no oil or other working medium, and...
30日
2020.12
Selection of oil-free vacuum pump
Oil-free vacuum pump refers to the vacuum pump chamber has no any medium (gas, liquid) mixed with the pumped medium, such as dry screw vacuum pump, dry rotary vane vacuum pump, scroll vacuum pump, Roots vacuum pump, claw vacuum pump, piston...
30日
2020.12
Screw vacuum pump application process
Dry screw vacuum pumps began to be used in the 1980s, initially in the semiconductor industry, and in the early 1990s in the chemical industry. Its main features are as follows: 1. No pollution to the process gas 2. No waste water is produc...
30日
2020.12
Characteristics and application of screw vacuum pump
Dry screw vacuum pump is a technological product with very high technical content, which is mainly used in the vacuum process with high purity. The vacuum degree is very high, and it can adapt to the harsh working conditions. It has the abi...
30日
2020.12
Industrial application of screw vacuum pump
(1) Application of screw vacuum pump in solvent recovery in pharmaceutical industry Apis using a solvent crystallization process are usually filtered, washed, and vacuum dried after crystallization. The moisture content in the material is u...
30日
2020.12
Improvement method of oil-free vacuum pump system
With the rapid development of vacuum pump technology, the original vacuum equipment and vacuum process system can not meet the new requirements of energy saving, high efficiency and environmental protection, especially the recovery of proce...