7
mobile or fixed lifting or materials handling equipment; namely, elevators, freight elevators, conveyors, chain-conveyors, roller-conveyors, belt-conveyors, spiral (or screw)-conveyors, belt-driven worm gear lifts, rope lifts, cranes, electric cranes, warehouse cranes, shop cranes and wall cranes; pneumatic hoists; pneumatic pumps; suction pumps
9
industrial vacuum machines; automatic and mobile pilotless cleaning machines; data processors for automatic and mobile pilotless cleaning machines; vacuum cleaners; automatic and mobile pilotless cameras for surveillance, security or safety or quality inspection; floor polishing machines; floor waxing machines; rug shampooing machines
12
street cleaning trucks; street cleaning trucks equipped with a water tank and sprayer; street cleaning trucks equipped with rotating brushes; street cleaning trucks equipped with a water tank and sprayer and rotating brushes; street cleaning trucks with a narrow wheel base making them suitable for sidewalks as well as small streets; tunnel cleaning trucks equipped with a rotating brush mounted on an extendable mechanical arm for cleaning tunnel walls; garbage trucks; garbage trucks equipped with a refuse compactor; garbage trucks equipped with a lift for emptying dumpsters; snow plow trucks; salt-spreading trucks; tanker trucks equipped with pump and hose for removing liquid or semi-liquid wastes or excess water from basements, holding tanks and the like; automatic pilotless electric wheeled vehicles for delivering mail or small items; trucks equipped with hydraulic lifting platforms