[Patent] A Ball Valve with dual seat-contact structures and an internal pressure releasing structure > R&D Performance - KORVAL

[Patent] A Ball Valve with dual seat-contact structures and an internal pressure releasing structure > R&D Performance

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[Patent] A Ball Valve with dual seat-contact structures and an internal pressure releasing structure

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A Ball Valve with dual seat-contact structures and an internal pressure releasing structure

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Now[Patent] A Ball Valve with dual seat-contact structures and an internal pressure releasing structure

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