74128312
Jan 7, 1991
Mar 2, 1993
exhaust ventilators for industrial installations; air conditioning units; air cooling units for industrial installations; heaters; heat recovery units; air deodorizing units for industrial installations; air sterilizing units for industrial installations; humidifiers; fans; air curtains; ventilating units for spray painting booths; air filtering units for industrial installation; air filters for industrial installations; furnaces for solid, liquid or gaseous fuels especially for woodchips, bark, straw, waste from winnowing, cork, nutshells, peats, fabric waste and briquettes; combustion installations comprising cranes for collecting fuel or bins, shredders or metering bins, feeding conveyors, boilers, step-grates, flue gas ventilators, flues; flue gas cleaning units; boilers; furnace grates; furnace step-grates; furnace chain grates; and flues
Environmental Control Apparatus