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Barnes Group Inc. provides engineered products, industrial technologies, and solutions in the United States and internationally. The company operates through two segments: Industrial and Aerospace. The Industrial segment offers precision components, products, and systems used by various customers in end-markets, such as mobility, industrial equipment, automation, personal care, packaging, electronics, and medical devices. This segment also designs and manufactures hot runner systems, mold cavity sensors and process control systems, and precision high cavitation mold assemblies for injection molding applications; provides force and motion control solutions for various metal forming and other industrial markets; and designs and develops robotic grippers, end-of-arm tooling systems, sensors, and other automation components for intelligent robotic handling solutions and industrial automation applications. In addition, it manufactures and supplies precision mechanical products, including mechanical springs, and high-precision punched and fine-blanked components used in mobility and industrial applications. This segment sells its products primarily through its direct sales force and distribution channels. The Aerospace segment produces fabricated and precision machined components and assemblies for turbine engines; and nacelles and structures for commercial and defense-related aircraft. It also provides aircraft engine component maintenance, repair, and overhaul services for turbine engine manufacturers, commercial airlines, and defense market; and manufactures and delivers aerospace aftermarket spare parts. This segment serves original equipment manufacturing industry. Barnes Group Inc. was founded in 1857 and is headquartered in Bristol, Connecticut.

PowerShares Build America Bond Portfolio (the Fund) seeks investment results that correspond generally to the price and yield performance of an index called The BofA Merrill Lynch Build America Bond Index (the Index). The Fund will normally invests at least 80% of its total assets in the securities that comprise the Index. The Index is designed to track the performance of the United States dollar-denominated Build America Bonds publicly issued by the United States and territories, and their political subdivisions, in the United States market. The investment advisor of the Company is Invesco PowerShares Capital Management LLC.

EnerSys provides various stored energy solutions for industrial applications worldwide. It operates in three segments: Energy Systems, Motive Power, and Specialty. The company offers uninterruptible power systems applications for computer and computer-controlled systems, as well as telecommunications systems; switchgear and electrical control systems used in industrial facilities and electric utilities, large-scale energy storage, and energy pipelines; integrated power solutions and services to broadband, telecom, renewable, and industrial customers; and thermally managed cabinets and enclosures for electronic equipment and batteries. It also provides motive power products that are used to provide power for electric industrial forklifts used in manufacturing, warehousing, and other material handling applications. In addition, the company offers mining equipment, diesel locomotive starting, and other rail equipment. Further, it provides specialty batteries for starting, lighting, and ignition applications in transportation; and energy solutions for satellites, military aircraft, submarines, ships, and other tactical vehicles, as well as medical and security systems. Additionally, the company offers battery chargers, power equipment, battery accessories, and outdoor cabinet enclosures, as well as related after-market and customer-support services for industrial batteries. The company sells its products through a network of distributors, independent representatives, and internal sales forces. The company was formerly known as Yuasa, Inc. and changed its name to EnerSys in January 2001. EnerSys was incorporated in 2000 and is headquartered in Reading, Pennsylvania.

Kennametal Inc. engages in development and application of tungsten carbides, ceramics, and super-hard materials and solutions for use in metal cutting and extreme wear applications to enable customers work against corrosion and high temperatures conditions worldwide. The company operates through two segments, Metal Cutting and Infrastructure. It offers standard and custom products, including turning, milling, hole making, tooling systems, and services, as well as specialized wear components and metallurgical powders for manufacturers engaged in various industries, such as the manufacturers of transportation vehicles and components, machine tools, and light and heavy machinery; airframe and aerospace components; and energy-related components for the oil and gas industry, as well as power generation. In addition, the company provides specified product design, selection, application, and support services; and standard and custom metal cutting solutions to aerospace, general engineering, energy, and transportation customers. Further, it produces compacts, nozzles, frac seats, and custom components used in oil and gas, and petrochemical industries; rod blanks and abrasive water jet nozzles for general industries; earth cutting tools and systems used in underground mining, trenching and foundation drilling, and road milling; tungsten carbide powders for the oil and gas, aerospace, and process industries; and ceramics used by the packaging industry for metallization of films and papers. The company provides its products under the Kennametal, WIDIA, WIDIA Hanita, and WIDIA GTD brands through its direct sales force; a network of independent and national distributors; integrated supplier channels; and through the Internet. The company was founded in 1938 and is based in Pittsburgh, Pennsylvania.