名词
中文翻译：主水库出口阀
同义词：
['主要水库出口阀，主水库出口控制阀']
例句：
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1.The main reservoir outlet cock is responsiblefor controlling the flow of water from thereservoir to the downstream system.
主水库出口阀负责控制水库向下游系统的水流。
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2. Theengineers had to replace the main reservoiroutlet cock due to its age andwear.
由于阀门老化磨损，工程师们不得不更换主水库出口阀。
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3. Main reservoir outletcocks are designed to prevent backflow during maintenance or repairs.
主水库出口阀设计用于在维护或修理期间防止回流。