人们已经用过各种类型的机械控制面来偏转固体推进剂火箭的排气流。

A variety of mechanical surfaces have been employed for deflecting the exhaust jets of solid-propellant rockets.

youdao

人们已经用过各种类型的机械控制面来偏转固体推进剂火箭的排气流。

A variety of mechanical surfaces have been employed for deflecting the exhaust jets of solid-propellant rockets.

youdao