... after-sale service Features:Practical and portable anesthesia machine, more suitable for the hospital, the ambulance clinics, beauty salons, ... closed, half openScope: adults, childrenSupply air: oxygen pressure 0.3 ~ 0.5MPaOxygen double-tube flowmeter: 0.05 ~ 1L/min ... function, single-tank configuration (enflurane, isoflurane optional) 2012 new Anesthesia Machine for CE and ISO certificate