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一、调查统计情况据灵山列检所1987年6～8月份对100个列车的调查统计,关门车总辆数为189辆而其中装103阀的关门车为166辆。现谈谈造成关门车的原因并提出减少关门车的建议。
I. Investigation and Statistics According to the survey of 100 trains from June to August 1987 in Lingshan Inspection Station, the total number of closed doors was 189 and that of the 103 closed doors was 166. We are going to talk about the reasons for closing the car and put forward proposals to reduce the number of cars we have closed.