| http://www.w3.org/ns/prov#value | - 20120115060PROPORTIONAL VALVE HAVING AN IMPROVED SEALING SEAT - A proportional valve for controlling a gaseous medium, in particular hydrogen, including a nozzle body which has at least one pass-through opening, a closing element which releases and closes the pass-through opening on a valve seat, and an elastic sealing element, which provides a seal on the valve seat, the closing element being art
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