In the mid-1970s to the 1980s, also designed and produced with the "75" type on the 9th, the 12th standard single turnout supporting cross points turnout, crossover, single symmetric turnout on the 6th, the 18th big turnouts, three turnout, turnout concrete sleeper, such as supporting the "75" series turnout. By the early 1990s, the type of railway switches, laying of railway use "75" type (including "62" type) turnout over 100,000 manufacturers railway turnout group, accounting for more than 80% of the total railway turnouts. With 60kg / m of promotion and application of China in the late 1970s began to develop and 60kg / m of supporting the turnout. Considering the 60kg / m rail is under heavy load and high speed for road conditions to use, so the design of 60kg / m of supporting turnout, the use of technical standards than the "75" type of turnout higher level. The main technical criteria are as follows. Rail type of 50kg / m and 60kg / m (in the future also includes 75kg / m) rails, excluding 43kg / m rail. Using the layout style semi-tangent type Tibetan sharp tip rail, circular curved guide curve, in addition to the tip rail turnouts tip 2mm gauge widening, the rest are standard gauge, to ensure smooth operation during high-speed driving. Gansu railroad crossing railway turnouts knowledge _ _ machinery provided by Lin Xin Yang Zhou Xin Yang Machinery Industrial Co., Ltd. Forest City Xin Yang Machinery Industry Co., Ltd. (www.lzxyjx.com) strong, credible, in Henan railway, subway equipment and other equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xin Yang Machinery and you hand into the brilliant, for a better future!