Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn (ISO/DIS 4869-2:2014); German version prEN ISO 4869-2:2014
Aerospace series - Heat resisting alloy FE-PA4901 (X12CrNiCoMoW21-20), solution treated and precipitation treated - Bar and section D<(Index)e> <kleiner => 100 mm