Abstract：Symmet ric sw itches are usually used in the process of na rrow gaug e t ra nspo rtation o n tunnel const ruction si te. Refi t ting av ai lable sing le swi tch to symmet ric one ca n dispense w ith desig n a nd making w o rk. In this paper, a detailed method fo r refi t ting the sing le swi tch to symmet ric one i s presented.
牛学勤，王志刚. 单开道岔改装对称道岔的方法研究[J]. 铁道工程学报, 1997, 14(4): 55-59.
Niu Xueqin Wang Zhigang. STUDY ON THE METHOD FOR REFITTING SINGLE SWITCH TO SYMMETRIC ONE. Journal of Railway Engineering Society, 1997, 14(4): 55-59.
1997, Vol. 14 
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