名词中文翻译
中文翻译：扩张器
同义词：
['expander', 'expansion rod']
例句：
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1.The engineer used an expansion mandrel to adjust the size of the pipe.
工程师使用膨胀杆来调整管道的大小。
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2.The expansion mandrel was used to expand the rubber band.
膨胀杆被用来扩展橡皮筋。
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3.The expansion mandrel was inserted into the tire to increase its size.
膨胀杆被插入轮胎中以增加其大小。