本台记者探访长征七号运载火箭:适应环境 防水体现到设计之中
This reporter visited the long march seven launch vehicle: to adapt to the environment of waterproof embodied in the design
本台记者探访长征七号运载火箭:适应环境 防水体现到设计之中
This reporter visited the long march seven launch vehicle: to adapt to the environment of waterproof embodied in the design
你的鼓励是对作者的最大支持