... 1, Large flow, industrial gas meter; 2, Application: natural gas, liquid petroleum gas and coal. commercial gas meterFeature:1, large flow2, steel shell, ... , machinery counter display the accumulate gas, liquid-crystal display the surplus gas6, very safe and reliable7, steel cover...Parameter:Nominal ... Design life span:>=15 yearsStandard: GB/T6968-1977gas meter>..... commercial gas meter