名词
中文翻译：自胀式活塞环
同义词：
['self-expanding valve', 'self-expanding plug']
例句：
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1.The self-expanding piston ringis a crucial component in the engine's operation.
自胀式活塞环是发动机运行中的关键部件。
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2. The manufacturerclaims that their self-expanding piston ring hasa longer lifespan than other brands.
制造商声称他们的自胀式活塞环比其他品牌有更长的使用寿命。
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3. During maintenance,the technician replaced the worn out self-expanding piston ring with a newone.
在维护期间，技术人员用一个新的自胀式活塞环替换了磨损的零件。