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Standard and/or project under the direct responsibility of ISO/CS Secretariat Stage ICS
ISO/IEC Guide 21:1981/Add 1:1983
Adoption of International Standards in national standards — Addendum 1: Indication of the degree of equivalence between national standards and International Standards
95.99
ISO 5220:1981/Add 1:1984
Air distribution and air diffusion — Aerodynamic testing and rating of constant and variable dual or single duct boxes and single duct units — Addendum 1: Variable primary flow rate control devices with induced flow facility
95.99

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