The cap halted the oil flow a week before Tropical Storm Bonnie blew through and forced a temporary halt to drilling of a relief well that will seal the leak for good.
封堵油井一周后，热带风暴邦尼来袭，迫使减压井的海上作业暂时停止，而减压井将有益于封堵漏油。
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。
Most of the valve is sealed using force, that the valve is closed, forced to rely on external ram pressure to the valve seat to ensure the sealing surface of the seal.
大部分闸阀是采用强制密封的，即阀门关闭时，要依靠外力强行将闸板压向阀座，以保证密封面的密封性。
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