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介绍了岩性密度测井仪大耐磨板磨损程度的确定方法。实践证明利用（ＳＳ２ＡＬ－ＳＳ２ＢＫ）与（ＳＳ１ＡＬ－ＳＳ１ＢＫ）的比值来检验大耐磨板的磨损程度是一种行之有效的方法
The method to determine the wear degree of large wear plate of lithology density tool is introduced. Practice has proved that the use of (SS2AL-SS2BK) and (SS1AL-SS1BK) ratio to test the wear of a large wear-resistant plate is an effective method