This part of GB/T 778 specifies the test report format, which can be used in conjunction with GB/T 778.1-2018 and GB/T 778.2-2018.
GB/T 778.3-2018 Referenced Document
GB/T 778.1-2018 Meters for cold potable water and hot water.Part 1: Metrological requirements and technical requirements
GB/T 778.2-2018 Meters for cold potable water and hot water.Part 2:Test methods
GB/T 778.3-2018 history
2018GB/T 778.2-2018 Meters for cold potable water and hot water.Part 2:Test methods
2007GB/T 778.3-2007 Measurement of water flow in fully charged closed conduits.Meters for cold potable water and got water.Part 3:Test methods and equipment
1996GB/T 778.3-1996 Measurement of water flow in closed conduits--Meters for cold potable water--Part 3:Test method and equipment