Earth and fire

 作者:蔚栋     |      日期:2019-02-27 02:19:00
By Barry Fox Forest fires are often difficult to fight because of the lack of water. Now Ignacio, Javier and Pedro Abascal Rubio of Pamplona, Spain, have devised a machine that puts out such fires, without water (WO 97/15352). A tractor cuts down trees around the fire with its power shovel while a plough wheel at the rear churns up the ground feeding the earth to a spinning turbine. The turbine throws the finely dispersed soil through a nozzle, creating a jet of earth,