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Germany GSR was founded in 1971, belonging to the Indus Holding AG Group. Since its establishment, GRS has been committed to the development, research and sales of valves and fittings, covering almost all areas of application. In addition to the variety of conventional products, but also provide high temperature (350 ℃), high pressure (350bar) and large diameter (DN400) solenoid valve and pneumatic valve, electric valve, but also according to the user's requirements, special design specifications of electric valve .