
Refrigerating System And Heat Pumps - Qualification Of Tightness Of Components And Joints
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Refrigerating System And Heat Pumps - Qualification Of Tightness Of Components And Joints
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻