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1984年3月1日2409次货物列车,运行于新丰镇至张桥区段,在通过关山车站时,车站值班员发现机后18位车下冒火星。列车通过后,发现道心内有脱落的制动梁两件和下拉杆、固定杠杆、移动杠杆、固定杠杆支点各一件。固定杠杆支点从最外端圆销孔处被拉断,脱落件的各圆销及开口销均在原连接位置上。图1为此车脱落件。
On March 1, 1984, 2409 cargo trains operated in Xinfeng Town to Zhangqiao section. When passing through the station of Guanshan Station, the attendant on duty of the station found that 18 vehicles behind the plane were firing Mars. After the train passed, it was found that there were two pieces of brake beam falling off in the road heart and one piece of the lower lever, the fixed lever, the movable lever and the fixed lever. The fulcrum of the fixed lever is pulled off from the pin hole of the outermost end, and the pins and cotters of the falling piece are in the original connecting position. Figure 1 is the car off pieces.