... and professional anesthetists.5. The density and the flow of nitrous oxide and oxygen can be adjusted ... , obvious effect.Technical SpecificationsRespiratory Controller:Maximum total flow:≥ 20L/minPrecise flow: min 0.5LAdjustable nitrous oxide and oxygen ... Respiratory controller, gasbag, double-nasal mask, respiratory pipeline, car, adjustable pressure valve, double-cylinder, flow meter, T-head.Optional ...