ICS 27.010CCS F 19中华人民共和国国家标准GB/T 45027—2024液氢阀门　通用规范Valves for liquid hydrogen—General specification2024-12-31 发布2025-04-01 实施国家市场监督管理总局国家标准化管理委员会发 布目　　次前言 ······································································...