whistle buoy 汽笛浮标 ; 响哨浮标 ; 哨浮标 ; [水运] 鸣笛浮标
light and whistle buoy 灯光警笛浮标
bell-and-whistle buoy 钟响呜笛浮标
bell and whistle buoy 钟声汽笛浮标
bell whistle buoy 铃响浮标
switch and whistle buoy 灯光警笛浮标
light and whistle buoy detail 音响灯标
Air is forced up from the buoy counterweight tube during downward motion causing the balls to seal the air ports in the valve, thus forcing the air to flow into the whistle.
空气在向下运动过程中受到浮标向上的推力，使阀球将阀门里的气舱密封住，这样迫使气流进入雾笛。
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