film coolant injection hole

例句：

1. 1. The technician carefully injected the coolant into the film cooling system to ensure optimal performance.
   技术人员小心翼翼地将冷却剂注入到薄膜冷却系统中，以确保最佳性能。
2. 2.During the manufacturing process, it is crucial to maintain proper pressure and temperature to prevent damage to the film cooling system.
   在制造过程中，保持适当的压力和温度至关重要，以防止薄膜冷却系统受损。
3. 3. The film cooling system plays a critical role in reducing heat transfer between the engine and the cylinder wall, whichcan improve fuel efficiency and reduce emissions.
   薄膜冷却系统在减少发动机与气缸壁之间的热传递方面起着关键作用，这可以提高燃油效率并减少排放。