名词
中文翻译：阀门阀芯
同义词：
['valve stem', 'valve seat']
例句：
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1. Thevalve stem is crucial for the proper functioning of the valve.
阀芯对于阀门的正常运作至关重要。
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2. The valve stem needs tobe cleaned regularly to prevent blockages.
需要定期清洁阀芯以防止堵塞。
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3. The valvestem was replaced due to wear and tear.
由于磨损，阀芯被更换了。