air pollution control apparatus for industrial use, namely wet electrostatic precipitators, dry electrostatic precipitators, dry horizontal electrostatic precipitators, continuous emission monitors and parts thereof and accessories, namely electronic controls, control panels, rigid electrodes, hoppers, rappers, filter bags, dampers and manifolds

Gas Cleaning Apparatus-Namely, Gas Scrubbers and Fabric Filters

ELECTROSTATIC PRECIPITATORS AND PREASSEMBLED PRECIPITATOR CONTROL ROOMS AND PANELS

ENVIRONMENTAL CONTROL APPARATUS-NAMELY, MECHANICAL GAS FLOW CONTROLS; NOISE ABATEMENT APPARATUS-NAMELY, SOUND CONTROL EQUIPMENT COMPRISING SOUND TRAPS, SOUND SILENCERS, SOUND ENCLOSURES, SOUND BARRIERS AND PANELS AND SOUND PLENUMS; WATER CONDITIONING EQUIPMENT-NAMELY, SAND FILTERS