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1.The safety system has a liquid-level alarm to prevent the tank from overfilling.
安全系统有一个液位报警，以防止水箱溢出。
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2. The engineers installed a liquid-level alarm in the pipeline to monitor the level of oil.
工程师们在管道中安装了液位报警器，以监测油的水平。
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3. The liquid-level alarm is triggered when the water level reaches a certain point.
当水水平达到一定点时，液位报警器会被触发。