Last Updated
：2025/12/04
Quizzes for review
A valve that opens to allow reflux of a fluid in case of overflow.
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return valve
During heavy rain, the return valve opened to let excess water flow back into the drainage channel, preventing pressure buildup in the tank.
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During heavy rain, the return valve opened to let excess water flow back into the drainage channel, preventing pressure buildup in the tank.
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English - English
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