efficiency (physics) simulation and modelling 12 aerials 8 thermal pumps 7 construction 5 heating 5 substances 4 more ... drug plants 4 radiocommunications 4 wireless communicaation 3 energy 3 solid fuel boilers 3 mathematical models 3 cartridges 3 hand firearms 3 machine drives 3 consumption 3 fire arms 3 technical standards 3 waste water treatment 3 Rayleigh-Ritz method 2 asynchronous motors 2 cooling mechanisms 2 electric motors 2 power engineering 2 herbicides 2 compressors 2 measurement 2 eye diseases 2 plant protection 2 less ...