一、轨枕挡肩破损状况的分析: 海林工区早于一九六二年就开始铺设(?)轨枕,一九七五年上行线线路大修时,对上、下行线来个填平补齐,对一些小于650~M半径的曲线上也铺上了。由哈局第三工程段施工,(?)轨枕类型是69丰75型,每公里直线铺设1760根,曲线1840根,是人力抽换,垫墩起道法施工, I. Analysis of Damaged Sleeper Shoulder Shoulders: The Hailin work area began laying sleepers as early as 1962. When the upper line was overhauled in 1975, , For some less than 650 ~ M radius of the curve is also covered. Construction by the third section of Kazakhstan Bureau, (?) Sleeper type is 69 abundance 75, laying 1760 lines per kilometer, the curve 1840, is the human exchange, paddles from the road construction,