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Georg Rost und Soehne Armaturenfabrik GmbH und Co. KG.
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Porta Westfalica, DE
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Patent Grant
Self closing valve
Patent number
4,577,829
Issue date
Mar 25, 1986
Georg Rost und Soehne Armaturenfabrik GmbH und Co. KG.
Reiner Strangfeld
E03 - WATER SUPPLY SEWERAGE
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