1.问题的提出 2.行车安全问题 3.轮箍烧热问题 4.初步结论1.问题的提出××到×××煤矿不到20公里的专用线,在运量及地形上的特点是:а)到煤矿方向是空车,由煤矿到××是重车,——现在不在这里研究运量的绝对数字和通过能力问题,而只明瞭一点即可:空车方向用一个 1. Problems raised 2. Traffic safety issues 3. The problem of wheel heat 4. Preliminary conclusions 1. The issue raised × × × × × × Coal mine less than 20 km of dedicated lines in the traffic and topography is characterized by : а) to the coal mine direction is empty, by the coal mine × × is a heavy car, and now not here to study the absolute number of traffic and capacity problems, but only a little bit can be: empty car direction with a