Selected texts: hydro power from energy for rural development Nas, Washington DC
The water turbine differs from the waterwheel in that there is a contrived steady flow of water through passages created by the turbine blades or buckets. There are well-established classes of turbines generally classified ...
Mineral resources for Africa's development: anchoring a new vision : issues paper 1
Africa is endowed with considerable amounts of mineral resources and ranks first or second in quantity of world reserves of bauxite, chromite, cobalt, industrial diamond, manganese, phosphate rock, platinum-group metals, ...