Oil pressure in the lubrication system is（）than the static sea water head to ensure that sea water cannot enter the sterntube in the event of seal failure.

（）is used to prevent the entry of sea water to the mach...

单项选择题（）is used to prevent the entry of sea water to the machinery space.

The thrust from the propeller to the hull of the ship i...

单项选择题The thrust from the propeller to the hull of the ship is transferred by（）

The transmission system transmitting power from the eng...

单项选择题The transmission system transmitting power from the engine to the propeller is composed of shafts, bearings, and（）