Use no oil vacuum pump, avoid polluting the environment in the production.
使用无油真空泵，避免污染环境的生产。
The electronic circuitry of the various vacuum protection schemes, which use sputtering ion pump or cold-cathode or hot cathode ionization gauge as sensors, was compared.
分析比较了溅射离子泵、冷阴极电离超高真空计、热阴极电离超高真空计等作为真空保护传感器的不同电子学设计。
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.
所谓真空于燥，就是将干燥物料处在真空条件下，进行加热干燥，如果利用真空泵进行抽气抽湿，则加快了干燥速率。
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