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Hydrometer: An instrument used for measuring the specific gravity of a liquid or solution.
比重计：量度液体或溶液的比重的仪器。
youdao
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A hydrometer used to determine the specific gravity of acid solutions.
比重计：量度液体或溶液的比重的仪器。
youdao
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A hydrometer used to determine the specific gravity of acid solutions.
比重计：量度液体或溶液的比重的仪器。
youdao