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IRJET- Minimization of Casting Defects of Double Beat Valve (Bonnet) | It cast, Metal casting process, Valve
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File:Double-beat valve, from beam engine cylinder (New Catechism of the Steam Engine, 1904).jpg - Wikimedia Commons
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File:Double-beat valve, from beam engine cylinder (New Catechism of the Steam Engine, 1904).jpg - Wikimedia Commons
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