Chemical analysis kit for testing oil in refrigeration systems; ceramic particles for use as a filtering media in molecular sieves for dehydration of liquids and gases | Equipment in the nature of liquid refrigerant receivers made of metal, namely, high pressure cylinders sold empty, liquid storage tanks and storage drums; metal oil line strainers and metal filtering tubes being structural parts of metal pipes and copper and brass fittings therefor; manually operated metal valves | Oil line strainers being machine parts; lubricant filters for mechanical purposes; machine parts, namely, mechanically operable pressure valves, pressure valves, pressure relief valves, manual shut off valves and mechanically operable safety release valves; oil line strainers being machine parts; oil-water separators for pneumatic controls being part of machines; filters for refrigerating machines; valves being machine parts; pressure regulators being parts of machines | Filters for laboratory use or optical use; automatic control valves; pressure relief valves for refrigerant gas in case of overpressure due to fire or other means; fluid flow sight-glasses and switches for monitoring liquid flow and its condition; testing manifold gauges for refrigeration system; oil meters for measuring oil level in refrigeration systems; sight glasses used to inspect a process vessel or tank in refrigeration systems; pressure sensors | Parts for refrigeration systems, namely, heat exchangers, receivers, condensers, chillers and heaters; filters that are parts of heating and cooling installations; filters that are parts of plumbing installations, namely, bathroom plumbing installations, shower plumbing installations and sink plumbing installations; external filtering device for use in a local containment area for removing oil and other contaminants from storm drain effluent as it exists storm water systems; valves being parts of cooling installations, namely, mechanically operable pressure valves, pressure valves, pressure relief valves, manual shut off valves and mechanically operable safety release valves; driers for refrigeration systems; drying apparatus for oil filters used in refrigeration systems; pressure regulators for gas, water or other sanitary installations; valves for air conditioners