... anesthesia Scope: adults, children Low gas alarm source: when oxygen gas source pressure is too low, audible alarm more than ... order to ensure patient safety Low-voltage protection: When the oxygen pressure is lower than 0.1MPa, the nitrous oxide ... Power supply: 220V ± 10%, 50HzŸ ± 1% Flowmeter: Oxygen, nitrous oxide, fourŸ meters (0 ~ 10L/min) Oxygen / nitrous oxide linkage to ensure that the ...