English language 21 Russian language 20 French language 12 German language 12 Spanish language 10 Italian language 9 air transport 2 more ... instruments 2 combustion 2 machine parts and joints 2 equipment 2 chemical technology 1 chemistry 1 electronics 1 electrotechnics 1 geodesy 1 geografické informace 1 Japanese language 1 cartography 1 kvantové zesilovače 1 mathematics 1 Dutch language 1 oborová terminologie 1 steam boilers 1 steam turbines 1 Portuguese language 1 radiocommunications 1 buildings (construction) 1 civil engineering 1 synthetic polymers 1 less ...