名词
中文翻译：三脚量规
同义词：
['three-legged caliper', 'three-point caliper']
例句：
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1. The engineer used a three-legged caliper to measure the lengthof the pipe.
工程师用三爪卡尺测量管子的长度。
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2. The technician was usinga three-legged caliperto check the accuracy of the measurements.
技术员正在使用三爪卡尺检查测量的准确性。
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3. The surveyor used a three-legged caliper to measurethe width of the road.
测量师用三爪卡尺测量道路的宽度。