“铁路工务物语” 系列之九：

                                                  道尺

                                                 你有两种用途

                                  量轨距

                                  测水平

                                  铁路线路离不开你

                                  你是工务线路工长的“火眼金睛”

                                  你的作用大

                                  你的功劳伟

                                  线路工长们，是根据你

                                  量出来的轨距

                                  测出来的水平

                                  确定线路整治处所和任务

                                  目的是要使两股钢轨的

                                  轨距和水平

                                  始终保持在

                                  允许误差值范围

                                 这样

                                 保持着千里铁道线路优质平顺

                                 保证着列车运行安全畅通平稳