名词
中文翻译：正列螺钉不稳定
同义词：
['positivecolumn screw instability', 'positive columnscrew instability']
例句：
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1. The new design of the machine hasa positive column screw instability problem.
这台机器的新设计存在正列螺钉不稳定问题。
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2. The engineer found that the positivecolumn screw instability was due tothe weak bolts holding the structure together.
工程师发现，正列螺钉不稳定是由于结构中较弱的螺栓造成的。
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3. To address thisissue, the manufacturer recommended replacing all thepositive column screws with stronger ones.
为了解决这个问题，制造商建议将所有正列螺钉更换为更坚固的。