名词
中文翻译：主气阀
同义词：
['master valve', 'master control valve', 'master shutoff valve例句：1. The master air valve is responsible for controlling the flow of air in the engine.（主气阀负责控制发动机中空气的流动。）']
例句：
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1. The master air valve is responsible for controlling the flow of air in the engine.
主气阀负责控制发动机中空气的流动。
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2. The master air valve is essential for maintaining proper air pressure in the engine.
主气阀对于保持发动机内适当的气压至关重要。
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3. The master air valve must be replaced regularly to ensure optimal performance of the engine.
主气阀需要定期更换，以确保发动机的最佳性能。