2017-Nov, VWAM, Valves for Vacuum Service...Article 10, App VI ASME sec V, Article 10, App IX ISO...
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2017-Nov, VWAM, Valves for Vacuum Service...Article 10, App VI ASME sec V, Article 10, App IX ISO 15848-1, Annex A ASME sec V, Article 10, App IV, ISO 15848-1 Annex B Type Vacuum Vacuum
