history 188 military aircrafts 138 electronic circuits 131 air force 127 mathematics 121 material testing 113 sugar beet 74 more ... thermal insulation 71 aircraft construction 70 nuclear safety 63 architecture 56 nuclear power stations 53 roofs 53 electrotechnics 52 construction materials 48 concrete constructions 45 civil engineering 45 electronics 44 building designing 43 roof covering 41 measurement 41 casting 41 simulation and modelling 41 production 41 geodesy 40 physics 39 mathematical statistics 38 radio receivers 38 radio transmitters 37 concretes 36 less ...