Applicable to closed, semi-open inhalation anesthesia, control or assisted ventilation, monitoring and display of patient ventilation parameters. Suitable for adults and children. APL valve is available, with good airtight, easy to operate, cleaning and disinfecting, concentration precise control temperature, flow, and pressure compensation techniques. Phenyl urea and sevoflurane are supplied as needed by an optional isoflurane anterior evaporator. As gas drives and electrical control, color LCD screens show various monitoring parameters.