JJF 1857-2020 Calibration Specification for Energy Efficiency Testing Apparatus of Room Air Conditioners Using Balanced Ambient Room-type Calorimeter Method (English Version)
National Metrological Technical Specifications of the People's Republic of China
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2020JJF 1857-2020 Calibration Specification for Energy Efficiency Testing Apparatus of Room Air Conditioners Using Balanced Ambient Room-type Calorimeter Method