名词
中文翻译：底部卷曲
同义词：
['bottom turn', 'bottom curl']
例句：
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1.The car was damaged during the accident and had to be bottom rolled.
汽车在事故中受损，不得不进行底部卷曲。
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2. The engineer carefully bottom rolled the metal beam to ensure its strength.
工程师仔细地对金属梁进行底部卷曲，以确保其强度。
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3.During construction, workers often need to bottom roll heavy materials to move them easily.
施工过程中，工人们经常需要对重物进行底部卷曲，以便轻松移动。