A.Passing alternately steam and air through while hot carbon
B.Burning oil
C.spraying oil into a carburettor filled with hot brick elieckar work through which the gases pass
D.heating water at high temperature in a copper vessel
A.Passing alternately steam and air through while hot carbon
B.Burning oil
C.spraying oil into a carburettor filled with hot brick elieckar work through which the gases pass
D.heating water at high temperature in a copper vessel