with fuel-supporting surfaces that move through the combustion zone, e.g. with chain grates

Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber > with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts > with fuel-supporting surfaces that are specially adapted for advancing the fuel through the combustion zone > with fuel-supporting surfaces that move through the combustion zone, e.g. with chain grates

Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber > with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts > with fuel supporting surfaces that are specially adapted for advancing fuel through the combustion zone > with fuel-supporting surfaces that move through the combustion zone, e.g. with chain grates