Chemical engineering plant for use in the control of environmental pollution, gas cleaning plant including electro-precipitators, dust collection plant, fluidised bed plant for heating or cooling, calciners, roasters, dryers and coolers, all being for bulk treatment of materials on an industrial scale, incinerators, water treatment plant, water sedimentation plant, liquid/solid filters in this class, cooling towers, effluent treatment plant, and parts and fittings for all the above goods other than ignition devices and apparatus

Chemical engineering plant in this class; gas cleaning machines in this class; powder classifiers; liquid/solid filters in this class; and parts and fittings for all the above goods other than egnition devices and apparatus

Gas cleaning plant including electro-precipitators and parts thereof