名词
中文翻译：正交记录仪
同义词：
['sigma recorder', 'sigma recorder instrument']
例句：
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1. Thesigma recording methanometer was usedto measure the gas concentration in the sample.
正交记录仪被用来测量样品中的气体浓度。
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2. The sigma recording methanometer was used to analyze the chemicalcomposition of the sample.
正交记录仪被用来分析样品的化学成分。
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3. Thesigma recording methanometer was used todetect any contaminants in thesample.
正交记录仪被用来检测样品中的任何污染物。