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See Chinese contents: JJG 162-2009 JJG 162-2009: Verification Regulation of Cold Water Meter
This regulation is applicable to the type evaluation, first verification, subsequent verification and in-use inspection of cold water meters. The cold water meter referred to in this regulation is a water meter that measures clean cold water flowing through a closed pipe and has a temperature of T30 or T50, including mechanical water meters, mechanical water meters equipped with electronic devices, water meters based on electromagnetic or electronic principles.
