今年九月上旬,四方车辆研究所会同青岛橡胶制品厂以及大连机车车辆工厂、齐齐哈尔车辆工厂,在齐齐哈尔铁路局科学技术研究所冷冻试验室进行了K形橡胶圈代替三通问主鞴鞴金属胀圈的低温冷冻试验。由于参加试验的全体同志共同努力,特别是由于冷冻试验室的领导和同志们全力支持,试验 In early September of this year, Sifang Vehicle Research Institute, in conjunction with Qingdao Rubber Products Factory, Dalian Locomotive and Rolling Stock Works and Qiqihar Vehicle Factory, conducted a K-shaped rubber ring in place of the tee in the Freezing Laboratory of Science and Technology Research Institute of Qiqihar Railway Bureau. Circle of low-temperature freezing test. Due to the joint efforts of all the comrades participating in the experiment, especially due to the full support of the leaders and comrades of the refrigeration laboratory, the experiment