
Refrigerating systems and heat pumps - Qualification of tightness of components and joints (ISO/DIS 14903:2016); German and English version prEN ISO 14903:2016
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Refrigerating systems and heat pumps - Qualification of tightness of components and joints (ISO/DIS 14903:2016); German and English version prEN ISO 14903:2016
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频