Water pipe motor valve -- Part 1: Ball valve for industry
水管电动阀第1部分:工业用球阀
2010-01-01
ISO 18984-2025
Ball valves for thermoplastics piping systems for hot and cold water installations under pressure — Types, dimensions and requirements
压力下冷热水装置用热塑性塑料管道系统用球阀 类型、尺寸和要求