步兵战车侧减速器的密封，采用的是接触式机械密封型式。
The contact-type mechanical seal is used in the final drive of the infantry combat vehicle.
为此，改为非接触式螺旋槽机械密封。
So that the seal was changed for non-contacted type spiral slot mechanical seal.
浮环密封和接触式机械密封需要密封油及油液控制系统，其控制系统复杂、维护费用高、污染严重、能耗较大、稳定性较低；
The two kinds of shaft seal have several disadvantages, for example, complicated control system, highly maintenance cost, serious contamination, more power consumption and lower stability.
浮环密封和接触式机械密封需要密封油及油液控制系统，其控制系统复杂、维护费用高、污染严重、能耗较大、稳定性较低；
The two kinds of shaft seal have several disadvantages, for example, complicated control system, highly maintenance cost, serious contamination, more power consumption and lower stability.
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