A、too little seal water
B、improper gravity disc
C、oil discharging pump not working very well
D、low water level of the working water
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A、too little seal water
B、improper gravity disc
C、oil discharging pump not working very well
D、low water level of the working water
时间：2022-01-03 17:20 关键词： 船舶电气与船舶安全