| http://www.w3.org/ns/prov#value | - t switches, valve positioners & solenoid valves, water/wastewater air release, ball, butterfly, check, plug water & sewage valves for industrial & building applications, flow control products for the oil & gas industry, including ball & check valves & wellhead equipment, fluid power hydraulic valves & manifolds, including electronics, solenoid, directional, pressure control & cartridge valves, fil
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