rocket motor case

例句：

1. 1. The rocket motor case was designed to withstand extreme temperatures.
   火箭发动机外壳设计来承受极端温度。
2. 2. The rocket motor case is crucial for the safe operation of the spacecraft.
   火箭发动机外壳对航天器的安全运行至关重要。
3. 3. The rocket motor case is made from a lightweight alloy that reduces weight without compromising performance.
   火箭发动机外壳由一种轻质合金制成，既减轻了重量又没有降低性能。