... :high/low limit,low O2 supply pressure,power failure,alarm silence:≤120s Pneumatic SpecificationGas supply:O2,N2O:0.28-0.6MPaFlowmeters:O2:0-1L/min ... ; 1-10L/min N2O:0-1L/min; 1-10L/minGas system:O2 deficiency alarm ... ,hypoxic guard system,O2 flush:35-75L/minWorking mode:Closed,Semi-closed ...