Aerospace series; test methods for transparent materials for aircraft glazing; part 21: determination of resistance to crack propagation (K-factor); german version EN 2155-21:1989— 9 стр.
Aerospace series - Test methods for transparent materials for aircraft glazing - Part 22: Determination of thermal relaxation of stretched acrylic sheet
Agricultural machinery - Equipment for sowing - Minimization of the environmental effects of fan exhaust from pneumatic systems - Amendment 1 (ISO 17962:2015/DAM 1:2020); German and English version EN ISO 17962:2015/prA1:2020