名词短语
中文翻译：针辊
同义词：
['ball-end needle roller', 'ball-ended needle roller例句：1. The machine has a needle roller with a ball end that can be used for various purposes.（这台机器有一个带球头的针辊，可以用于各种目的。）']
例句：
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1. The machine has a needle roller with a ball end that can be used for various purposes.
这台机器有一个带球头的针辊，可以用于各种目的。
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2. The engineer designed the needle roller with a ball end to improve the accuracy of the cutting process.
工程师设计了带球头的针辊，以提高切割过程的准确性。
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3. The new needle roller with a ball end is more efficient than the old one in handling small parts.
新型带球头的针辊比旧的更高效地处理小部件。