名词
中文翻译：正压阀
同义词：
['positive relief valve', 'positive pressurevalve']
例句：
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1. The positivevalve is responsible for maintaining the proper pressurein the system.
正压阀负责维护系统中适当的压力。
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2. The positive valve was designed toprevent backflow during maintenance.
正压阀设计用于在维护期间防止回流。
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3. The positivevalve is essential for ensuring safe operation ofthe pump.
正压阀对于确保泵的安全运行至关重要。