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This document applies to interchangeable (abbreviation NS) double oblique bore stopcocks made from glass (P), nominal sizes 3 and 4, with solid (M) or hollow (H) plugs and elbow connections (B). This document has been prepared by Working Committee NA 055-01-03 AA "Glasgeräte und Apparate" ("Glassware and glass apparatus") at DIN Standards Committee Laboratory Devices and Installations (FNLa).
This document replaces DIN 12553:2020-03 .