名词
中文翻译：球压入器同义词
同义词：
['ball injector', 'ball press', 'ball plunger']
例句：
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1. The ball indenter is used to indent the surface of a material for testing purposes.
球压入器用于给材料表面压痕，以便进行测试。
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2. The ball indenter was designed to be easy to use and precise in its measurements.
球压入器设计得易于使用且测量精确。
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3. The ball indenter was used to measure the depth of the hole in the sample.
球压入器被用来测量样品中孔的深度。