پیش ساخته astm a479 با بهترین کیفیت
ASTM A479-2017. Current edition approved March 15, 2017. Published March 2017. Originally approved in 1962. Last previous edition approved in 2016 as A479/A479M – 16a. DOI: 10.1520/A0479_A0479M-17. For ASME Boiler and Pressure Vessel Code applications see related Specif i - cation SA-479/SA-479M in Section II of that Code.