NFA 49 004:1984废止
Steel Tubes - Seamless And Welded Tubes With Circular Section And Supplies To Be Welded - General Outlay Of Dimensions - Preferential Selection
出版：Association Francaise de Normalisation
专家解读视频
84 [01/10/1984]
ISO 3419:1981 - Similar
ISO 4200:1991 - Similar
ISO 3419 : 1981 - Similar to
ISO 4200 : 1991(R2018) - Similar to
ISO 4200 : 1991(R2018) - Similar to
ISO 3419 : 1981 - Similar to
