It is powered by two jet-turbine engines which operate both the five-bladed main rotor and, through a gearbox and shafts, a pair of propellers on two short wings.
One of his tasks is to use a computer-controlled machine tool to burn tiny cooling holes electrically in 3-inch-long turbine blades for aircraft jet engines.
他的工作职责之一就是用机控机床为喷气式飞机引擎的3英尺长的涡轮机叶凿出小孔。
3
This is the turbine to compressor mechanical advantage mentioned earlier that is employed in jet engines and is key to making them work!