在管道系统中起对介质的接通或截流，流通能力强，压损小，双向密封可达到零泄漏。
In the pipe system, the medium is connected or cut, the flow capacity is strong, the pressure loss is small, the two-way sealing can achieve zero leakage.
船舶管道在气囊作用下往往形成空气塞，阻碍燃油等液体的流通，对柴油机的正常工作带来不利影响。
The air play caused by air cavity sometimes blocks up flowing of liquid such as fuel oil in marine piping , and brings some unfavorable influence for works.
电线(30)内产生的热在保护管道内传递到流通通过冷却管(20)的冷却水，并耗散到保护管道(11)的外部。
Heat generated in the wire (30) is transmitted in the protective pipe (11) to the cooling water flowing through the cooling pipe (20) and discharged in the outside of the protective pipe (11).
电线(30)内产生的热在保护管道内传递到流通通过冷却管(20)的冷却水，并耗散到保护管道(11)的外部。
Heat generated in the wire (30) is transmitted in the protective pipe (11) to the cooling water flowing through the cooling pipe (20) and discharged in the outside of the protective pipe (11).
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