NFA 49 247:1981被替代
Steel Tubes - Tubes Welded Longitudinally For Heat Exchangers - Austenitic Stainless Steels - Dimensions - Technical Delivery Conditions
出版：Association Francaise de Normalisation
专家解读视频
81 [01/02/1981]
ISO 2604-5:1978 - Similar
ISO 6758:1980 - Similar
ISO 6758 : 1980(R2012) - Similar to
ISO 2604-5 : 1978 - Similar to
ISO 6758 : 1980(R2012) - Similar to
ISO 2604-5 : 1978 - Similar to
