舰船隐身性是世界各国普遍关注的大问题。
Warship stealth is a main problem which attracts many countries 'attention.
由于隐身性的需求，复合材料—钢混合结构的封闭式桅杆逐渐在舰船上使用。
To meet the needs of stealth, the enclosed masts with composite and steel materials are gradually applied on warships.
因此扭曲舵可以减小舵上空化剥蚀和振动，对舵的使用寿命和舰船的隐身性是有利的。
As a result, twisted rudders can reduce the cavitation erosion and vibration on the rudder, which is favorable to the service life of a rudder and the stealth of ships.
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