ISO 24025-1-2020 实施日期:2020-05-13 现 行 英文名:Plastics — Sulfone polymer moulding and extrusion materials — Part 1: Designation system and basis for specificati
ISO/IEC 23008-4-2020 实施日期:2020-06-04 现 行 英文名:Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 4: MMT