独特的安全阀结构,具有两个渠道:一个用于空气,一个用于水。
The unique relief valve construction incorporates two channels: one for air, one for water.
一个香蒲叶风扇可用于冷却空气。
后来我知道,在灯塔顶部有一个用于检测空气湿度的探雾器。
Later I learn that a fog detector close to the top of the lighthouse measures the amount of moisture in the air.
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