研究结果表明，主动维护技术的重点是对液压系统故障进行事前的防护，而不是事后的维修。
The research result shows that the important point of the proactive maintenance is the prevention of the fault of the hydraulic system in advance, instead of the maintenance afterwards.
电磁场防护结构工艺、被动轴接地系统、主动轴接地系统和电场抵消系统是目前降低舰船极低频电场的主要方法。
The main methods used to reduce ELFE include electromagnetic field protection technology, driven shaft earthing system, drive shaft earthing system and electric field counteracting system.
油轮静电问题直接关系到整个油轮的安全。目前，为了防止油轮静电事故的发生，采取了一些防护措施，但基本上没有采用主动的监测系统。
The problem of static electricity concerns the safety of an oil carrier, Nevertheless, no active monitor-systems have been adopted at present, only some protective measures are taken.
油轮静电问题直接关系到整个油轮的安全。目前，为了防止油轮静电事故的发生，采取了一些防护措施，但基本上没有采用主动的监测系统。
The problem of static electricity concerns the safety of an oil carrier, Nevertheless, no active monitor-systems have been adopted at present, only some protective measures are taken.
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