According to the company, the large and heavy vacuum tube-based traveling wave tube amplifiers cannot be effectively replaced by GaAs transistors because they a much lower breakdown voltage.
根据公司的消息，真空管将不会被砷化镓晶体管取代。
2
The advantage of vacuum oven is that lower drying temperatures are used which decrease the deterioration of the dry matter.
真空烘箱法的优点为采用较低的烘干温度，从而减少干物质的变质。
3
Under lower cyclic stresses, the fatigue cycles to failure in vacuum is increased approximately 4 times than in air.