The piston crown employs the usual jet-shaker principle with an arrangement of cooling bores in the crown so that the surface temperatures of the crown are moderate with a very even distribution（）

The development goals for a large marine engine are man...

单项选择题The development goals for a large marine engine are many often interact and in some cases even with each other（）

The key feature of the Sulzer RT-flex system is that it...

单项选择题The key feature of the Sulzer RT-flex system is that it gives complete freedom in the and operation of fuel injection and exhaust valve actuation（）

A clearly visible beneath of RT-flex engines is their o...

单项选择题A clearly visible beneath of RT-flex engines is their operation at all ship speedsThis is achieved by the superior combustion performance（）