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

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