ullage engine造句

例句与造句

1. The two APSs were also used as ullage engines to settle the propellants in the aft tank engine feed lines prior to the trans-lunar injection burn.
2. The 11D33 engine was the world's first staged-combustion-cycle rocket engine, and also the first use of an ullage engine to allow a liquid-fuel rocket engine to start in space.
3. "' Ullage motors "'( also known as "'ullage engines "'or "'ullage rockets "') are relatively small, independently fueled rocket engines that may be fired to accelerate the rocket prior to main engine ignition, when the vehicle is in a zero-g situation.
4. It's difficult to find ullage engine in a sentence. 用ullage engine造句挺难的