Feature：A. Medical staffs can choose one among the three modes such as constant-time, constant-volume and constant-pressure according to the patients’ condition or can circularly choose anyone among the three modes.B. Multiform respiratory modes can be chosen under the three switching modes, which can guarantee for clinical subtle respiratory treatment.C. Comprehensive setting and display of alarm value.D. Configured with exact adjustment system for respiratory gas-oxygen concentration, calculagraph and constant temperature humidifier for inspiration gas.E. Perfect computerized monitor for ventilating parameters and display for presetting number. 

Specifications：　Frequency(IPPV)：6～60 breaths/min 　I/E ratio：1 : 1～ 1 : 3 　Tidal volume ：100～1500ml ／time　Inspiration pause：O～0 .5s with five gears　SIGH：Sigh is added once per 100 breaths of respiration and its volume is 1.5 times as much high as that of the ventilation. 　Synchronous sensitivity ：－2～－0.1KPa　PEEP/CPAP：O～2KPa　Display of airway pressure：-2～6KPa 　Concentration of inspiration gas and oxygen：21%～100% adjustable 　Display of inspiration time：0.2～9.9s　IPPV inspiration flux：0.1～1.5L/s　Intermittent command ventilation frequency：1～15breaths／min　Alarm for upper-limitation of airway pressure：1.0～6.0KPa　Alarm for lower-limitation of airway pressure：0～2.0KPa　Switching time between synchronization mode and control mode：6s　Display of minute volume:0～30L　Presetting inspiration pressure：0.1～3.5KPa

　Ventilation modes: Inspiration pause, CPAP, IPPV,IPPB,PEEP,SIMV, IPPV+SIGH, First-aid ventilation