piston skirt clearance

例句：

1. 1. The engine needs to be tuned for optimal performance.
   发动机需要调校以获得最佳性能。
2. 2. The technician inspected the piston skirt clearance to ensure it was within safe limits.
   技术人员检查了活塞裙间隙，以确保它处于安全范围内。
3. 3. The manufacturer recommends a piston skirt clearance of at least 0.5 mm for smooth operation.
   制造商建议活塞裙间隙至少为0.5毫米，以保证顺畅运行。