名词
中文翻译：正位移计
同义词：
['positive displacement gauge', 'positive displacement transducer']
例句：
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1. The engineer used a positive displacement meter to measure the volume of the fluid.
工程师使用正位移计来测量流体的体积。
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2. The positive displacement meter was used to monitor the flow rate of the oil in the pipeline.
正位移计被用来监测管道中油的流量。
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3.The positive displacement meter was accurate and reliable, providing valuable data for the study.
正位移计准确可靠，为研究提供了宝贵的数据。