伊图里河铁路分局管辖的铁路沿线,地处祖国最北方,冬季长,气温低,无霜期短。一般常在零下四十三度至四十六度间。年平均无霜期不是三个月,年降雪最多曾达七十余天。该分局所管辖铁路特点是连续长大上坡道多,小半径曲线多。在伊图里河至莫尔道嘎和伊图里河至金河间,解放6型蒸汽机车上行只能牵引500—550吨,下行牵引350—400吨。在冬季,由于线路轨面经常被霜雪以及油水粉尘冻结物所覆盖,轮轨间的粘着系数显著下降,造成机车在牵引列车上岭运行时,经常发生频繁的空转,使列车速度下降,因而造成 Ituri River Railway Branch under the jurisdiction of the railway, located in the northernmost part of the motherland, long winter, low temperature, frost-free period is short. Usually between minus 43 degrees to 46 degrees. The average annual frost-free period is not three months, the annual snowfall up to more than seventy days. The branch under the jurisdiction of the railway is characterized by continuous uphill ramp, small radius curve and more. In the Ituri River to Mo Erda Ga and Ituri River to the Golden River, the Liberation 6 steam locomotive can only be pulled 500-550 tons of uplink, down 350-400 tons traction. In winter, because the track surface is often covered by frost and snow and oil-water dust and frozen objects, the adhesion coefficient between the wheel and rail decreases significantly, causing the frequent idling when the locomotive runs on the tractor train to slow down the train speed Cause