šŸ”
The increased gain of 10 dbs for single line & ā€˜Dā€™ marks rails on double/multiple lines
shall be employed for classification of defects.
(i) defect in weld
(ii) defects in rail. *
(iii) for both defects on weld & rail.
(iv) None of above.
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ii) defects in rail. *
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