名词
中文翻译：返回的滚筒
同义词：
['roller return', 'roller retractor']
例句：
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1.The machine has a roller return to help it move smoothly.
这台机器有一个滚筒返回来帮助它平滑移动。
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2. The roller return is designed to reduce friction and improve efficiency.
滚筒返回设计用来减少摩擦并提高效率。
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3.The roller retractor was used to quickly remove the heavy material from the workbench.
滚筒回缩器被用来迅速将重物从工作台上移除。