
HEATING COSTS BASED ON CONSUMPTION; DETERMINATION OF HEATING COSTS BY HEATING- AND WATERCOUNTERS
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
HEATING COSTS BASED ON CONSUMPTION; DETERMINATION OF HEATING COSTS BY HEATING- AND WATERCOUNTERS
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频