If over a period of time, the oi1 film partially disappears, so that dry areas are formed on the cylinder wall, these areas and the piston surfaces will by frictional interaction, become finely scuffed and hardened, iegood mirror surface" will have deterioratedWhat condition of the piston rings can result in this phenomenon?()
英译中(Translate):critical period of water()
During a period of “whiteout”,you should expect which of the following?()
The approval period for a shipboard oil pollution emergency plan expires after ().
The word “critical” in the sentence “This is a critical period as any loss of propulsion, or steering, can lead to collision, grounding, or other damage to the ship” can be best replaced by ().
An inclined semisubmersible with a very short rolling period about a constant angle of list is likely to have().
The cooling water temperature () over a period of 8 hours, and then shut down.
It is necessary for us () after having served for a certain period.
During a()period, as a newly commissioned SES, your IMN will be past to the other CESs.
Before an auxiliary boiler is shutdown for an extended period of time, the water in the boiler should have a pH value of ().