... ; 2, Application: natural gas, liquid petroleum gas and coal. commercial IC card gas meterFeature:1, very large flow;2, steel shell ... , liquid-crystal display the surplus gas;6, safe and reliable;7, steel shell.Technical data:Nominal flow-rate:6M3/H, 10M3 ... lifespan:>=15 yearsStandard: GB/T6968-1977. commercial IC card gas meter