7 Machine tools and tools being part of machines for oil, gas, and geothermal wells, namely, machine tools and tools being part of machines for use in interior repair and maintenance of wells, pipes, pipelines and pipe systems; machine tools and tools being part of machines for use in drilling, boring and milling pipes, pipelines and pipe systems; machine tools and tools being part of machines for or use in fastening, loosening, collecting and removing material and mechanical devices in oil, gas, and geothermal wells; Machine parts and accessories for machine tools for oil, gas, and geothermal wells, namely, barriers, fittings, valves, bearings, chutes and brushes, all being parts of machines