名词
中文翻译：保持扣件
同义词：
['retaining nut', 'retaining bolt']
例句：
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1.The engineer used a retaining pawl to secure the heavy machinery in place.
工程师使用一个保持爪来固定重型机械。
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2.The construction crew had to remove the retaining pawl before they could proceed with the next step.
施工队在继续下一步工作之前必须拆除保持爪。
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3.The carpenter carefully removed the retaining pawl to replace the damaged part.
木匠小心翼翼地移除了保持爪，以更换损坏的部分。