01069nam a2200205Ia 4500 CTU_17526 210402s9999 xx 000 0 und d 621.6 F799 Fraenkel, Peter Water-pumping devices : A handbook for users and choosers Peter Fraenkel London Intermediate Technology 1986 The book surveys the water-lifting technologies which are available and appropriate for smllholdings - defined here as areas up to twenty-five hectares - and produces detaled guidance on the suitability of different methods of water-lifting in differents situations. Human-and animal-power; internal and external combustion systems; electrical, wind, solar and hydro-power; and the uses of biomass and coal - are all surveyed in detail, in relation to mechanical capability as well as costs, reliability and availability. Mechanical engineering,Pumps Minh Trung tâm Học liệu Trường Đại học Cần Thơ