Classification of environmental conditions. Classification of groups of environmental parameters and their severities, Stationary use at non-weatherprotected locations— 30 стр.
Road traffic noise reducing devices - Procedures for assessing long term performance - Part 1: Acoustical characteristics; German version EN 14389-1:2007— 11 стр.
Road traffic noise reducing devices - Procedures for assessing long term performance - Part 1: Acoustical characteristics; German version EN 14389-1:2015— 16 стр.
