23 INDUSTRIAL AND COMMERCIAL PARTS AND SURFACE CLEANING AND WASHING EQUIPMENT-NAMELY, PAIL-MOUNTED AND BARREL-MOUNTED PUMPING AND DISPENSING UNITS; MECHANICAL DECONTAMINATION UNITS; HIGH PRESSURE STEAM CLEANING UNITS; CASE AND CARTON WASHERS; TANKTYPE IMMERSION WASHING AND CLEANING UNITS; AND PARTS AND ATTACHMENTS FOR SUCH EQUIPMENT