The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is____________________?
(A) reflux valve
(B) sluice valve
(C) air relief valve
(D) pressure relief valve
The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is____________________?
(A) reflux valve
(B) sluice valve
(C) air relief valve
(D) pressure relief valve
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