主要特点：通风性能好，具有防止水溅入内部的功能，有挡水的功能。

　　It has good ventilation performance, has the function of preventing water from splashing into the interior, and has the function of retaining water

　　主要作用于管道或者侧墙上做侧送风口，用于调节送风气流的扩散角也可以用于改变气流的方向。用于洗手间，卫生间的回风，电梯，管道口，检修口的装饰。

　　It is mainly used as a side air vent on the pipe or side wall. It can also be used to change the direction of the air flow by adjusting the diffusion angle of the air flow. For the bathroom, the toilet, the air, the elevator, the pipe mouth, the decoration of the mouth.