BS 21:1957被替代
Pipe Threads For Tubes And Fittings Where Pressure-tight Joints Are Made On The Threads (metric Dimensions)
出版：British Standards Institution
专家解读视频
基本信息
标准编号： BS 21:1957
标准类别：Standard
出版单位：British Standards Institution
标准页数：0
标准备注
© British Standards Institution 2013
替代本标准的新标准
等同采用的国际标准
AS B53-1961 - Equivalent
