短语词组短语rocket -stare ramjet 火箭启动冲压喷气发动机solid rocket propellant ramjet 固体火箭冲压发动机solid rocket ramjet 固冲发动机rocket ramjet engine 火箭冲压发动机Hybrid rocket ramjet 固液混合冲压发动机integral solid rocket ramjet 整体式固冲发动机 返回 rocket ramjet