PRV (Pressure Reducing Valve) operation principle / 누수량 감소시키는 감압밸브 작동 원리
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Channel: 물방개야 어떻게 살거냐? (How to Survive?)
Views: 10,069
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Id: B30tMuO7-EI
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Length: 1min 52sec (112 seconds)
Published: Sun Dec 11 2022
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