astm a240 با کیفیت بالا با طرز کار خوب
approved in 1940. Last previous edition approved in 2016 as A240/A240M – 16a. DOI: 10.1520/A0240_A0240M-17. 2 For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-240 in Section II of that Code. 3 For referenced ASTM. بیشتر