behind ship test of propeller

例句：

1. 1. The engineer conducted a behind-ship propeller test to ensure the engine's performance.
   工程师进行了船尾螺旋桨试验，以确保发动机的性能。
2. 2. During the testing, the propeller was found to be underperforming compared to the standard model.
   在测试中，螺旋桨被发现比标准型号表现不佳。
3. 3. The company is known for its innovative behind-ship propeller designs that improve fuel efficiency.
   该公司以其创新的船尾螺旋桨设计而闻名，这些设计提高了燃油效率。