hard-drawn wire是什么意思

用法例句

Taking the Mudaogou Bridge Reconstruction Project as an example,the paper analyzes the crucial and difficult points of techniques in track lining and joining and breaks through the conventional mode of track lining and joining of existing electrified railway lines.

以木道沟桥改建工程最关键技术为实例,探讨了线路拨接施工中线路不同拨距时,接触网施工过渡方法,分析了线路拨接的技术重点和难点,打破既有电气化铁路线路拨接的常规模式,采用“利用既有、永临结合”的过渡施工方法。