alternating pressure

The temperature regulator tube plate and steel tube beam work in the frequent change of temperature for a long time, their high alternating pressure make the tube plate's weld crack and tube beam leak.

减温器管板和钢管束长期工作在频繁变化的温度中，交变压力很大，造成管板焊缝处经常开裂，管束泄漏。

the clinical effects of alternating pressure relief bed mattress in prevention of pressure ulcer

波浪床预防压力性溃疡的临床研究

Randomised, controlled trial of alternating pressure mattresses compared with alternating pressure overlays for the prevention of pressure ulcers: PRESSURE ( pressure relieving support surfaces)-trial

气垫床垫与气垫床罩预防压力性溃疡的随机、对照试验：PRESSURE（减压支持表面）试验

specification for alternating pressure air mattresses

交变压力气垫规范

Three-phase alternating frequency modulation control signal produced by 8051 CPU is magnified to control the switch of the silicon controlled rectifier in inverse main bridge circuit, thereby constant pressure speed-adjusting is realized.

由8051CPU产生三相交流调频控制信号，经放大来控制逆变主桥路中可控硅晶闸管的通断，从而实现恒压调速。

tiptoe around to the side a step, hands and knees, or so knock knees alternating pressure 36 times.

脚尖向两侧左右大开步，双手扶双膝，左右交替叩压膝36次。

alternating pressure pads or pumps

交互式压力垫或压力泵

and overlay of both alternating pressure, will become the physical and mental diseases constitute an important factor.

两者的交替出现及叠加的压力，将成为构成身心疾病的重要因素。