... show P-t and V-t wave-form,With necessary monitoring and alarm function, to make sure the operation safety,Classical CO2 ... ,Respiratory frequency,I:E ratio,Airway pressureO2 + N2O flowmeterHypoxic guard system, keep oxygen concentration isn`t lower than 25%Circle absorberSafety ... show P-t and V-t wave-form,With necessary monitoring and alarm function, to make sure the operation safety,Classical CO2 ...