This avoids the use of a traditional propellershaft and puts the propellers in a clear flow of water, which greatly improves efficiency.
这样就避免了使用传统的螺旋轴，将螺旋桨置于干净的水流中，从而大大提高了效率。
2
The 14-cylinder engine turns the longest propellershaft (130 metres) ever built, at the end of which is the largest propeller, weighing in at 130 tonnes.
14缸发动机转动最长的推进器杆(130米)，在其末端是最大的推进器，重130吨。
3
These drive the central propellershaft through bevel reduction gears with a 2:1 reduction.