柱塞向上运动过程中能够保持有效的密封，流线型的设计使其在大流量流体中下降过程中可以消除停机时间。
The plunger maintains efficient sealing during upward travel, and streamlined design enables falls against high flow rates to eliminate downtime during cycles.
现场，由于流量控制，UN001 航班至少要延误两小时，请把飞机从3 号停机位拖到28 号。
XXX, Ramp Control, there is at least two-hour delay for UN001 due to flow control, please tow the aircraft from stand 3 to stand 28.
现场，由于流量控制，UN001 航班至少要延误两小时，请把飞机从3 号停机位拖到28 号。
XXX, Ramp Control, there is at least two-hour delay for UN001 due to flow control, please tow the aircraft from stand 3 to stand 28.
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