| 摘要 |
In the process of heat-treating the head of a railroad rail wherein the rail is stressed so that the head forms a convex arc of predetermined height, the arc height is decreased about 14% after about 10% of the rail head has been heated, and then the original arc height is restored when about 40% of the rail head has been heated and then again decreased when about 60% of the rail head has been heated, and then finally the original arc height is again restored while the last 10% of the rail head length is heat treated.
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