单向阀被设计成在停电时预防水回流，防止可能发生的故障。

One-way valve is designed to prevent water in the return of the blackout to prevent failures that may occur.

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将单向阀（逆止阀）与T型接口设计成一体，简化了安装工序，克服由此引发的故障；

The check valve and T-joint are designed into one, this simplifies the installation process and avoids to some troubles.

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现有LED显示屏控制系统以单向开路的方式进行数据传输，在任意一个传输通路上发生故障时，LED显示屏都不能正确显示。

The existing control system of LED display transmits data with unidirectional open circuit way, but if any one of transmission paths was on the event of failure, LED display would not show correctly.

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