Cleaning machines and cleaning apparatus, namely, machines for cleaning surfaces using high and low pressure cleaning fluid; [multi-purpose high pressure washers;] rinsing machines for barrels; [hydraulic power units in the nature of hydraulic drives and fluid dynamic drives;] component parts of cleaning machines, namely, spraying heads, pipes, hydraulic [pumps, pneumatic compressors, motors, valves, pressure switches, electronic controls and sensors for monitoring, controlling, and switching...