ablation mode propulsion
AC electric propulsion apparatus
AC power propulsion system
AC-DC propulsion system
active rudder electric propulsion apparatus
adjustable-pitch screw propulsion
aero space propulsion system
Aerospace propulsion system
航空、航天推进系统
航天推进系统
航空、航无推进系统
航空、航大推进系统
航空/航天推进系统
航空航天推进系统
aerospace propulsion theory and engineering
air augmented water-jet propulsion
air breathing propulsion system
air force aero propulsion laboratory
air force rocket propulsion laboratory
air independent propulsion
air-breathing mode propulsion
airbreathing propulsion system