名词短语
中文翻译：端部直径
同义词：
['end diameter', "end radius例句：1. The pipe's diameter at the butt-end is 10 cm.（这个管子在端部的直径是10厘米。）"]
例句：
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1. The pipe's diameter at the butt-end is 10 cm.
这个管子在端部的直径是10厘米。
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2. The car's wheelbase is 2.5 meters, which is the diameter at the butt-end of the wheelbase.
汽车的轴距是2.5米，这是车轮轴在端部的直径。
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3. The new design reduces the diameter at the butt-end by 20% compared to the previous model.
与前一代车型相比，新设计减少了端部直径20%。