Normas ISO

Belt drives — Classical and narrow V-belts — Lengths in datum system

Heat recovery ventilators and energy recovery ventilators — Testing and calculating methods for performance factor — Part 1: Sensible heating recovery seasonal performance factors of heat recovery ventilators (HRVs)

Paper and board — Testing of cores — Part 2: Conditioning of test samples

Coal — Methods for petrographic analysis — Part 5: Method of determining microscopically the reflectance of vitrinite

Coal — Methods for petrographic analysis — Part 4: Method of determining microlithotype, carbominerite and minerite composition

Coal — Methods for petrographic analysis — Part 1: Vocabulary