drilling machines and equipment, namely machines and equipment for drilling earth; machines and equipment for drilling rock; in-the-hole percussive rock drilling machines; hydraulic rock drilling machines; water-powered percussive rock drilling machines; and accessories for drilling machines and equipment, namely drill bits, hammers, drill tubes, check valves, swivels, and pumps

Design and development of computer software systems for data input, output, processing, display and storage * ; all the aforementioned services within the area of borehole surveying and surveillance systems *

Design and development of computer software systems for data input, output, processing, display and storage