Non-destructive testing - Characterization and verification of ultrasonic phased array equipment - Part 1: Instruments (ISO/DIS 18563-1:2021); German and English version prEN ISO 18563-1:2021
District heating pipes - Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks - Part 1: Design; German and English version EN 13941-1:2019— 326 стр.
