First the machine takes off and hovers above the ground by firing downward-facing nozzles.

首先这种机器启动后加热朝下的喷嘴，会在地上盘旋。

youdao

The straight blow-off pipe has less blow-off resistance, the flushing area of the swirl nozzles and the fan nozzles is large, the water pressure is high, and the water consumption is less.

直管排污管的排污阻力小，旋 流喷嘴、扇形喷嘴的冲洗面积大、水压高、用水量小。

youdao

The engines would have variable nozzles, which would be fully opened on take-off and landing, so that the exhaust would be slow and relatively quiet, and narrowed when the aircraft was cruising, providing the necessary speed.

ECONOMIST: Green aircraft