该文写了裂纹部位、原因等,对现场工作有一定指导意义。大连分局两个货修段的技术人员和工人看后用于实践。1984年,几个列检人员共发现7件中梁裂纹,其中C_(50)(450工钢)就有5件(见下表),占71.4%,避免了可能发生的行车事故,对保证运输安全起到了一定作用。 This article has written the crack place, the reason, has certain guiding significance to the field work. Dalian Branch two repair section of the technical staff and workers to see after the practice. In 1984, several inspectors found a total of seven middle girder cracks, of which, there were five C50 (450 workers) steel (see table below), accounting for 71.4%, avoiding possible traffic accidents, Transport safety has played a role.