The design of the slanting valve trap keeps the valve door tightly closed when the pressure from the backflow gets higher, allowing the valve trap to perform its best function.
活门的斜角位设计，当回流压力越大，活门越能紧闭，发挥最佳的防回流功能。
The design of the slanting valve trap keeps the valve door tightly closed when the pressure from the backflow gets higher, allowing the valve trap to perform its best function.
活门的斜角位设计，当回流压力越大，活门越能紧闭，发挥最佳的防回流功能。
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