history 183 military aircrafts 138 electronic circuits 130 air force 127 mathematics 126 material testing 112 thermal insulation 77 more ... sugar beet 74 aircraft construction 70 nuclear safety 62 roofs 60 architecture 52 nuclear power stations 52 roof covering 49 construction materials 46 concrete constructions 41 building designing 41 simulation and modelling 41 casting 40 production 39 radio receivers 38 electronics 37 measurement 37 protection of buildings 37 radio transmitters 37 tunneling works 37 concretes 36 front walls 36 waterproof insulations 34 descriptive geometry 33 less ...