... or aluminum alloy 2) Anti-reversion and anti-gas thieving 3) ISO9001:2008 Advantages:1)Excellent ability of anti-reversion and ... can be changed into remote gas meters Or intelligent meter.2)Mechnical print wheel displays accumulated gas content, reliable measuring ... Technical features:Nominal flow 1.6m3/h,2.5m3/h,4m3/hMeasuring precision B GradeMWP(Maxmum Working ...