Evaluation of macrostructural defects in structural steels—Acid etching method and ultrasonic testing method
NORMA vydaná dňa 29.8.2025
Designation standards: GB/T 1979-2025
Note: K dispozici od: březen 2026
Publication date standards: 29.8.2025
Country: Chinese technical standard
Kategória: Technické normy GB