But during using on ship, the hydraulic pipelines and the bunch of soft pipeline, which were constitute by control electric cable, can not get a good control.
但在实船应用时，液压油管及控制电缆组成的液压软管束的状态得不到很好的控制，使用中容易遭到破坏，常常制约着其应用。
Soft soil in the offing with high moisture capacity and complex chemical composition will rust the metal pipeline.
金属管道在含水量大、化学成份复杂的近海软土中易发生锈蚀。
Height completely closed valve can be used in hot water taps, installing or removing the seat ring lug, the use of soft iron in the pipeline.
高度完全关闭闸阀可以用在热水龙头，或拆卸阀座环安装吊耳后，用在采用软铁块的管路中。
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