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Graham Corporation, together with its subsidiaries, designs and manufactures fluid, power, heat transfer, and vacuum equipment for chemical and petrochemical processing, defense, space, petroleum refining, cryogenic, energy, and other industries. It offers power plant systems, including ejectors and surface condensers; torpedo ejection, propulsion, and power systems, such as turbines, alternators, regulators, pumps, and blowers; and thermal management systems comprising pumps, blowers, and drive electronics for defense sector. The company also provides rocket propulsion systems consisting of turbopumps and fuel pumps; cooling systems, which include pumps, compressors, fans, and blowers; and life support systems that comprise fans, pumps, and blowers for space industry. In addition, it offers heat transfer and vacuum systems, including ejectors, process and surface condensers, liquid ring pumps, heat exchangers, and nozzles; power generation systems, such as turbines, generators, compressors, and pumps; and thermal management systems comprising pumps, blowers, and electronics for energy sector. Further, the company offers heat transfer and vacuum systems consisting of ejectors, process and surface condensers, liquid ring pumps, heat exchangers, and nozzles for chemical and petrochemical processing industry. The company also services and sells spare parts for its equipment. It sells its products directly in the United States, the Middle East, Canada, Asia, South America, and internationally. Graham Corporation was founded in 1936 and is headquartered in Batavia, New York.

Northwest Pipe Company, together with its subsidiaries, engages in the manufacture and supply of water-related infrastructure products in North America. It operates in two segments, Engineered Steel Pressure Pipe (SPP) and Precast Infrastructure and Engineered Systems (Precast). The SPP segment offers large-diameter and high-pressure steel pipeline systems for use in water infrastructure applications, which are primarily related to drinking water systems. Its products are also used for hydroelectric power systems, wastewater systems, seismic resiliency, and other applications. In addition, this segment makes products for industrial plant piping systems and certain structural applications. The Precast segment provides stormwater and wastewater technology products, precast, and reinforced concrete products, including reinforced concrete pipe, manholes, box culverts, vaults and catch basins, pump lift stations, oil water separators, biofiltration units, steel casing pipes, and bar-wrapped concrete cylinder pipes, as well as pipeline system joints, fittings, specialized components, and other environmental and engineered solutions. The company sells its water infrastructure products under ParkUSA, Geneva Pipe and Precast, Permalok, and Northwest Pipe Company brands primarily to installation contractors. Northwest Pipe Company was incorporated in 1966 and is headquartered in Vancouver, Washington.

Park-Ohio Holdings Corp. provides supply chain management outsourcing services, capital equipment, and manufactured components in the United States, Europe, Asia, Mexico, Canada, and internationally. It operates through three segments: Supply Technologies, Assembly Components, and Engineered Products. The Supply Technologies segment offers Total Supply Management that comprises engineering and design support, part usage and cost analysis, supplier selection, quality assurance, bar coding, product packaging and tracking, just-in-time and point-of-use delivery, electronic billing, and ongoing technical support services, as well as provides spare parts and aftermarket products; and production components, such as valves, fuel hose assemblies, electro-mechanical hardware, labels, fittings, steering components, and other products. This segment also engineers and manufactures precision cold-formed and cold-extruded fasteners, and other products comprising locknuts, SPAC nuts, SPAC bolts, and wheel hardware. The Assembly Components segment offers direct fuel injection fuel rails and pipes, fuel filler pipes, and flexible multi-layer plastic and rubber assemblies; turbo charging and coolant hoses; and value-added services comprising design engineering, machining, and parts assembly. The Engineered Products segment provides engineered products, including induction heating and melting systems, pipe threading systems, and forged and machined products for ferrous and non-ferrous metals, silicon, coatings, forging, foundry, automotive, and construction equipment industries; engineers and installs mechanical forging presses; sells spare parts; field services; and forges aerospace and defense structural components, such as landing gears and struts, as well as rail products comprising railcar center plates and draft lugs. Park-Ohio Holdings Corp. was founded in 1907 and is headquartered in Cleveland, Ohio.

Twin Disc, Incorporated designs, manufactures, and sells marine and heavy duty off-highway power transmission equipment in the United States, the Netherlands, China, Australia, Italy, and internationally. The company operates in two segments, Manufacturing and Distribution. Its principal products include marine transmissions, azimuth drives, surface drives, propellers, and boat management systems, as well as power-shift transmissions, hydraulic torque converters, power take-offs, industrial clutches, and controls systems. The company also provides non-twin disc manufactured products. It sells its products through a direct sales force and distributor network to customers primarily in the pleasure craft, commercial, and military marine markets, as well as in the energy and natural resources, government, and industrial markets. The company was incorporated in 1918 and is headquartered in Milwaukee, Wisconsin.