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直向速度200 km/h(以下简称“Vz200)”-60 kg/m钢轨12号系列交叉渡线是为了适应我国铁路运输发展的要求,满足铁路第五、第六次提速改造的需要,在60 kg/m-12号提速改进型Vz200单开道岔研制成功的基础上开发的新型提速渡线道岔,该系列道岔是我国首次利用可动心轨辙叉设计的交叉渡线,基本满足了我国铁路建设和运输事业发展对新型铁路提速道岔的迫切需求。
The straight-line speed of 200 km / h (hereinafter referred to as “Vz200”) "- 60 kg / m rail crossover line 12 series is to meet the requirements of the development of China’s railway transport to meet the railway needs of the fifth and sixth speed transformation , A new type of speed-increasing turnout developed on the basis of the successful development of the 60 kg / m-12 speed-improving Vz200 single-turnout has been basically the cross-over line designed by our country for the first time The Urgent Demands of the Development of Railway Construction and Transportation in Our Country for Turnout of New Type Railway.