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1. This tool is used to measure the angle of a surface accurately.
这个工具用于准确测量表面的角度。
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2. The engineer used this tool to check the accuracy of the machine's operation.
工程师使用这个工具检查机器操作的准确性。
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3. The technician was using this tool to make sure the workpiece fit perfectly.
技术员正在使用这个工具确保工件完美契合。