Inside engine room frame # 14 # 16 portside , starboard side there is sea chest at each side , they are connected by main sea pipe , the sea water pump of main engine , auxiliary engine , general bilge pump , ballast pump , firefighting pump , condensator cooling water pump , and sea water pressure tank can suck sea water from them 机舱内# 14 # 16左、右舷设有海水阀箱各一个，用海水总管相连，可供主机、辅柴油机的海水泵、舱底总用泵、压载泵、消防泵、冷凝机组冷却水泵及海水压力水柜吸水。
The paper creatively proposes the idea ofusing ordinary pressure signals ; ( pressure in valve boxes ) as system feature signal to pickup fault characteristic eigenvectors and verifies the correction of the method through self - correlation analysis in the time - zone and power spectral and wavelet packet analysis in the frequency - zone 为此，本文创造性地提出以常见的压力信号(阀箱内的压力)作为系统特征信号来提取故障特征向量的方法。这种方法信号测取简单、处理方便，有着振动信号方法无法比拟的优点。
