42 Engineering industrial design, analysis and research services in the field of pneumatic machines, piston machines, pest control traps, aerial launch mechanisms, launch assist systems, projectile weapons, projectile explosives for mining, military, tunnel boring and avalanche control, high pressure valves, machines and machine parts for construction, mining, drilling, oil exploration, fire control, pest control, demolition, foundation pile driving, aerospace and locomotion, emergency tools for search and rescue, machines and machine parts for automobiles, trucks, ships, aerospace, rockets and satellites; consultancy services in the field of industrial research and design of air compressor prototypes, engineering of air compressors, air compressor prototype simulations, piston machines, piston compressors, valving for machines, high pressure valving control systems; research and design services in the field of high pressured mechanisms; providing information in the field of machines, machine tools, air compressors, and hand held tools research and design; advisory and consultancy services in the field of machines, machine tools, air compressors, and hand held tools research and design