GB/T 778.1-2018饮用冷水水表和热水水表第1部分:计量要求和技术要求国家标准
英文:Meters for cold potable water and hot water—Part 1:Metrological requirements and technical requirements GB/T 778.1-20...
英文:Meters for cold potable water and hot water—Part 1:Metrological requirements and technical requirements GB/T 778.1-20...