24/30444461 DC
工业阀门 逸散性排放的测量、试验和鉴定程序 阀门阀杆密封件型式试验的分类系统和鉴定程序
BS EN ISO 12101 Industrial valves. Measurement, test and qualification procedures for fugitive emissions - Classification system and qualification procedures for type testing of stem seals for valves