جذابیت زیبایی شناختی astm a269 قابل تنظیم
ASTM A269 . Designation: A269/A269M − 15 Standard Speci f i cation for Seamless and Welded Austenitic Stainless Steel Tubing for General Service This standard is issued under the fi xed designation A269/A269M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.