低层大气层
inferior atmospheric layer
可操纵重板大气层飞般
maneuverable reentry vehicle
高速飞行器气动热计算
the computation of aerothermodynamic of the hypers
仪器飞行气象条件
b ending fatigue strength
autonetics
Autonomics
多层大跨
multi-storey and large-span
保护大气行动计划
Action Plan for the Protection of the Atmosphere