history 157 military aircrafts 135 electronic circuits 127 air force 127 material testing 110 sugar beet 72 thermal insulation 72 more ... aircraft construction 70 nuclear safety 60 roofs 58 roof covering 48 nuclear power stations 45 radio receivers 38 radio transmitters 37 casting 35 building designing 35 tunneling works 35 front walls 33 waterproof insulations 33 protection of buildings 33 simulation and modelling 32 electronics 31 radiation control 31 industrial automation 30 measurement 29 road tunnels 29 architectural elements 28 concretes 27 radiation monitoring 27 flat roofs 27 less ...