名词短语
中文翻译：Unknown
同义词：
['primary relief valve', 'primary pressure relief valve', 'primary safety relief valve']
例句：
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1. The primarysafety valve is designed to prevent overpressure in the system.
初级安全阀的设计目的是防止系统中的过压。
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2.The manufacturer recommends that the primary safety valve be replaced every five years.
制造商建议每五年更换一次初级安全阀。
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3. During maintenance, the technician must inspect and test the primary safety valve to ensure it functions properly.
在维护期间，技术人员必须检查和测试初级安全阀以确保其正常工作。