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ISO 14903:2017WithdrawnRefrigerating systems and heat pumps — Qualification of tightness of components and jointsInternational Standard · Published 12 Jul 2017 · ISO/TC 86/SC 1ISO 14903:2012WithdrawnRefrigerating systems and heat pumps — Qualification of tightness of components and jointsInternational Standard · Published 6 Nov 2012 · ISO/TC 86/SC 1