PNST 520-2021

Petrol filling stations. Part 2. Safety requirements for construction and performance of safe breaks for use on metering pumps and dispensers

United power system and isolated power systems. Relay protection and automation. Automatic emergency control of electric power systems. Automatic devices for limiting voltage reduction. Norms and requirements

System of standards on information, librarianship and publishing. Universal decimal classification. Structure, rules for use and indexing

Phthalic anhydride for industrial use. Method for the determination of impurities oxidirable in the cold by potassium permanganate

Information technology. Text and office systems. Office Document Architecture (ODA) and interchange format. Technical Report on ISO 8613 implementation testing. Part 1. Testing methodology

Textiles. Water resistance. Rain tests. Exposure to a horizontal water spray