Abrasive blast cleaning machines; Air compressors; Casting machines; Cutting machines; Electrical ultrasonic cleaning units for electronic equipment; Electroplating machines; Embossing printing machines; Engraving machines; High pressure washers; Injection moulding machines; Metal welding machines, namely, saws and cutters; Metal working machines; Polishing machines for use in grinding and polishing metal, wood, ceramics and plastics; Sand-blasting apparatus; Steam cleaning machines