pre-vacuum的意思|示意

The effect of vacuum pressure on vacuum pre -cooling is experimental researched in this paper.

通过实验研究了真空度对真空预冷的影响。

By applying different pre-pressure, the speed, torque and temperature of the ultrasonic motor in low and high vacuum have been tested and compared with the normal condition.

施加不同的预压力在低、高真空环境下对超声电机的转速、转矩及温升进行测量并与常态下相比较。

Main equipment: pre-heater, evaporator, condenser, sugar meter, vacuum system, temperature control, liquid level control, valve fittings, automatic electrical control system;

主要设备：预热器、蒸发器、冷凝器、糖度仪、真空系统、温度控制、液位控制、阀门管件、自动电气控制系统；

The vapor condenser is a very important device in vacuum pre-cooling equipment.

真空预冷装置中，捕水器是一个十分关键的部件。

The set takes Roots pump as its main pump and spinning vacuum pump as pre-stage pump.

本机组采用罗茨泵作为主泵，以旋片式真空泵作为前级泵。

Is the presented test program sufficient for GS certification for ash vacuum cleaners and ash pre-separators?

对于炉灰吸尘器和炉灰预分离器的现行测试标准是否满足GS认证的要求？