37 Chemical cleaning of pipe, tubing, components, tanks, hoses, and fittings in the food, pharmaceutical, semiconductor, and aerospace fields; precision cleaning of pipes, tubing, components, tanks, hoses and fittings in the aerospace, food, military, pharmaceutical, microelectronics and industrial fields; repair and cleaning of valves, pressure gauges, and components; oxygen cleaning of tubing, valves, vessels, sensors, and pressure gauges; precision cleaning of valves, pressure gauges, transducers assemblies, bellows, and components of all sizes in the semiconductor, food, aerospace, military, and pharmaceutical fields; cleanroom space rental; custom construction of temporary cleanrooms for others; on-site precision cleaning of piping systems of all sizes and materials, components, vessels and containers; providing mobile cleanrooms for temporary use by others; cleaning of cryogenic, hypergolic, breathing air, medical gas and other gas systems; precision cleaning of breathing apparatus, namely, high pressure tubing, hyperbaric chambers, vessels of various sizes, pressure gauges, regulators, valves, high pressure control stations and complex environmental control systems for divers and astronauts; boiler chemical cleaning and pipeline pigging and cleaning services, drying of tubing and components of others in a vacuum oven