Servo control alternatingpressure test will be the trend of alternatingpressure test in nation and abroad.
伺服控制型文变压力试验机将成为国内外交变压力试验机的发展趋势。
2
It introduced the principle of alternatingpressure caused by particle vibration, when ultrasonic propagating in liquor medium.
介绍了利用超声波在液体介质中传播，使质点产生强烈振动而引起交变压力的原理。
3
Objective to observe the clinical effects of alternatingpressure relief bed mattress in the prevention of pressure ulcer (PU), and to explore the best method for application of the bed.