1.portable anesthesia machine 2.easy to operate, applicable to basic hospitals ... limit, Lower airway pressure limit, Power failure, Silence time for alarm, Alarm for oxygen supply failure.Anesthesia machine flowmeterO2 0.110L/minN2O ... Safety performanceAlarm for oxygen failure,Overflow valve, Safety valve, N2O cut-off with oxygen failure.Photo 1 Piece/Pieces Portable Anesthesia machine with ventilator ...