What are your ship's drafts, foreandafter respectively?
你船的前后吃水分别是多少？
2
The grate will be, at intervals, performed according to the settled time or to the automatic control of pressure head between foreandafter-grate.
格栅的运行可按设定的时间间隔运行，也可根据格栅前后水位差自动控制。
3
Through measuring and comparing of the residual stresses be foreandafter treatment, it is result in raising the quality and effect of treatment and reducing the environment po…