名词
中文翻译：钢底圈
同义词：
['steel base', 'steel edge']
例句：
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1.The car's steel bottom rim is rusted and needs to be replaced.
这辆车的钢制底部边缘生锈了，需要更换。
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2. The construction site had a steel bottom rim installed to protect workers from falling objects.
施工现场安装了钢底圈来保护工人免受掉落物体的伤害。
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3.The new sports car has a sleek steel bottom rim that adds to its overall design.
这款新运动轿车拥有光滑的钢底圈，使其整体设计更加出众。