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一、前言根据原交通部(74)交科技研字33号文的指示,由齐齐哈尔车辆工厂、四方车辆研究所共同研制450吨长大货物车。该车的技术关键之一是心盘衬垫的试验研究,选择合理
I. Preface According to the instructions from the former Ministry of Communications (74) to hand over Scientific Research Letters No. 33, a 450-ton long-term goods vehicle was jointly developed by Qiqihar Vehicle Factory and Sifang Vehicle Research Institute. One of the key technologies of the car is the experimental study of heart pads, which is reasonable