名词
中文翻译：扩张的芯棒
同义词：
['expansion rod', 'expanding rod例句：1. The expanding mandrel was used to stretch the fabric.（扩张的芯棒被用来拉伸布料。）']
例句：
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1. The expanding mandrel was used to stretch the fabric.
扩张的芯棒被用来拉伸布料。
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2. The expanding mandrel was used to create a new shape in the material.
扩张的芯棒被用来在材料中创造新的形状。
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3.The expanding mandrel was used to measure the thickness of the material.
扩张的芯棒被用来测量材料的厚度。