... gas meter 1, Large flow, industrial gas meter; 2, Application: natural gas, liquid petroleum gas and coal. commercial gas meterFeature:1, large flow2, steel shell, easy to ... install3, prepaid, free-home meter reading4, data storage, replace the batteries without losing data5, machinery counter display the accumulate gas ... 15 yearsStandard: GB/T6968-1977gas meter>..... commercial gas meter