軌道保守 (3)

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[VI-690] Unification of heat treatment methods tongue rail in JR East

*Kazunori Shimada¹, yuichiro hori¹, Yuji kamiya² (1. JR East Co.Ltd., 2. Tetsudokiki Co.Ltd.)

Keywords:

tongue rail,heat treatment,Slack quench,quench temper,HH340

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