... , Application: natural gas, liquid petroleum gas and coal. commercial IC card gas meterFeature:1, very large flow;2, steel shell, easy ... /H, 25M3/H, 40M3/H, 65M3/H, 100M3/HMeasuring accuracy: B gradeoperating ambient temprature: -10degree ~ 50 degreeMax pressure of working: 10kPaPressure ... :>=15 yearsStandard: GB/T6968-1977. commercial IC card gas meter