Grinding operation on switch and crossing（一）
Recheck turn-out track
1. check geometric size by track ruler
2. Check if there are fat edges on stock rail and point rail by visual and touch.
Poor band of light
3. use the 10m tape measure to measure the drop point and mark it.
4. the reduction value of the rail is measured by the reduction rule.
5. use profile ruler to measure the profile, analyze the data, determine the grinding scheme, and mark the grinding range on the rail.
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