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See Chinese contents: JJG 162-2019 JJG 162-2019: Cold Potable Water Meters
This Regulation applies to the initial verification, subsequent verification, in-use inspection of cold portable water meters. The cold portable water meter referred to in this Regulation is a water meter, which has a temperature grade T30 and T50, measures cold portable water flowing through a closed full pipe, including water meters whose working principle is based on mechanical principle, water meters whose working principle is based on electronic or electromagnetic principle, water meters based on mechanical principle with electronic device.
