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

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