DIN EN 17539:2020 Modular mechanical locked floor coverings (MMF) - Determination of geometrical characteristics; German and English version prEN 17539:2020
2021DIN EN 17539:2021 Modular mechanical locked floor coverings (MMF) - Determination of geometrical characteristics; German version EN 17539:2021
2020DIN EN 17539:2020 Modular mechanical locked floor coverings (MMF) - Determination of geometrical characteristics; German and English version prEN 17539:2020