The original unstructured record data for the defect of the relay protection devices (RPDs) may contain problems influencing the data mining. and it is lack of quantitative evaluation. So the purpose of this paper is to evaluate the quality of these defective texts of relay protection devices. and it proposes a text quality evaluation method for the unstructured defect record of RPDs ... https://www.hindigyanvishv.com/limited-time-SYIL-X7-Vertical-Mill-big-deal/