2021KS B ISO 21028-2:2021 Cryogenic vessels — Toughness requirements for materials at cryogenic temperature —Part 2: Temperatures between −80 ℃ and −20 ℃
0000 KS B ISO 21028-2-2006(2016)
2006KS B ISO 21028-2:2006 Cryogenic vessels-Toughness requirements for materials at cryogenic temperature-Part 2:Temperatures between -80 ℃ and -20℃