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Advent Technologies Holdings, Inc., an advanced materials and technology development company, operates in the fuel cell and hydrogen technology markets in North America, Europe, and Asia. It develops, manufactures, and assembles fuel cell systems and critical components that determine the performance of hydrogen fuel cells and other energy systems. The company offers high-temperature proton exchange membrane (HT-PEM) fuel cells, including membrane electrode assemblies, bipolar plates, and reformers, as well as provides fuel-cell stack assembly and testing services. It serves stationary power, portable power, automotive, aviation, energy storage, and sensor markets. The company is headquartered in Boston, Massachusetts.

Art's-Way Manufacturing Co., Inc. manufactures and sells agricultural equipment, specialized modular science and agricultural buildings in the United States and internationally. The company operates through Agricultural Products and Modular Buildings. The Agricultural Products segment offers various specialized farm machinery, including portable and stationary animal feed processing equipment and related attachments; hay and forage equipment, such as forage boxes, bale processors, running gears, and dump boxes; manure spreaders; sugar beet harvesting equipment; dirt work equipment; and after-market service parts. The Modular Buildings segment produces, sells, and leases swine buildings, complex containment research laboratories, and research facilities for academic research institutions, government research and diagnostic centers, public health institutions, and private research and pharmaceutical companies. This segment also designs, manufactures, delivers, installs, and rents building units. It markets and sells its products through independent farm equipment dealers, and OEM sales channels. Art's-Way Manufacturing Co., Inc. was founded in 1956 and is based in Armstrong, Iowa.

Euro Tech Holdings Company Limited primarily distributes water treatment equipment, laboratory instruments, analyzers, test kits and related supplies, and power generation equipment to commercial customers, and governmental agencies in Hong Kong and the People's Republic of China. The company operates in two segments, Trading and Manufacturing, and Engineering. It sells analytical instruments, such as spectrophotometers, colorimeters, chromatographs, mass spectrometers, flow injector analyzers, automated sample preparation workstations, and atomic spectrometers; environmental monitoring instruments comprising air and water quality monitoring instruments; sample pre-treatment equipment; and general-purpose laboratory instruments consisting of water quality monitoring and analysis equipment. The company also distributes general testing and measuring equipment comprising multi-channel digital and analogue recorders, signal amplifiers, and calibration equipment for energy conservation, renewable energy equipment, power quality analyzers, and continuous emissions monitoring systems; and air pollution control systems to power plants, railway and aero-space industries, utilities, educational institutions, and telecommunications companies. In addition, it offers process control systems, including sensors, temperature and pressure gauges, power and energy consumption meters, flow meters, valves, temperature and pressure transmitters and control devices, and temperature and pressure calibrators, as well as moisture, power, energy, and harmonic analyzers; systems engineering services; and maintenance, installation assistance, and calibration services. Further, the company distributes programmable logic controllers, telemetry units, and supervisory control and data acquisition systems and software. Euro Tech Holdings Company Limited was founded in 1971 and is headquartered in Hong Kong, Hong Kong.

Highway Holdings Limited, together with its subsidiaries, manufactures and supplies metal, plastic, electric, and electronic components, subassemblies, and finished products for original equipment manufacturers (OEMs) and contract manufacturers. It operates through two segments, Metal Stamping and Mechanical OEM; and Electric OEM. The company also trades in plastic injection products; and manufactures and assembles automation equipment. Its products are used in the manufacture of products, such as photocopiers, laser printers, print cartridges, electrical connectors, electrical circuits, vacuum cleaners, LED power supplies, stepping motors, pumps for dishwashers, and other washing machine components. In addition, the company assists customers in the design and development of the tooling used in the metal and plastic manufacturing process, as well as provides an array of other manufacturing and engineering services, including metal stamping, screen printing, plastic injection molding, pad printing, and electronic assembly of printed circuit boards. It operates in Hong Kong and China, Europe, North America, and other Asian countries. Highway Holdings Limited was incorporated in 1990 and is headquartered in Sheung Shui, Hong Kong.