And of the flap garage door is also a kind of automatic lighting conditions, which can make our operation more convenient.
并且翻板车库门呢也是自动照明的一种状况的，这就可以让我们的运行比较的方便。
This valve is normally automatic work, in a direction of flow of fluid under pressure, open the flap valve;
通常这种阀门是自动工作的，在一个方向流动的流体压力作用下，阀瓣打开；
This valve is normally automatic work, in a direction of flow of fluid under pressure, open the flap valve;
通常这种阀门是自动工作的，在一个方向流动的流体压力作用下，阀瓣打开；
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