upper steam cylinder gasket

例句：

1. 1.The upper steam cylinder gasket is crucial for maintaining the proper operation of the engine.
   上蒸汽缸垫圈对于保持发动机正常运行至关重要。
2. 2. The engineer replaced the old upper steam cylinder gasket with a new one to prevent any leakage.
   工程师用新的上蒸汽缸垫圈替换了旧的，以防止泄漏。
3. 3. During maintenance, the technician carefully inspected the upper steam cylinder gasket to ensure it was in good condition.
   在维护期间，技术人员仔细检查了上蒸汽缸垫圈，以确保其处于良好状态。