名词
中文翻译：平底磨石
同义词：
['plain stone', 'flat grinder']
例句：
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1.The plain grinder is used to grind the grains into flour.
平底磨石用于将谷物磨成面粉。
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2. The plain grinder is a simple tool that can be used for many different tasks.
平底磨石是一种简单的工具，可以用于许多不同的任务。
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3. The plain grinder was used to make the dough into a smooth surface.
平底磨石被用来使面团变得光滑。