In many developed countries, such as America, Japan, conventional oil vacuumpump has been replaced by dry screw vacuumpump in more and more fields.
在欧美和日本等发达国家，螺杆型干式真空泵在很多领域已经越来越多的代替了传统的有油泵。
2
This paper introduced a new type and special structured vacuumpump unit suitable for dry type reduced-pressure distillation.
本文介绍适用于干式减压蒸馏的特殊结构真空抽气设备。
3
It is well known that vacuum drying is to put raw material under the state of vacuum for heating and drying. If use vacuum to pump air and humidity out, the dry speed will be faster.