Electric traction ; dropper clamp for grooved contact - wires and catenary 牵引电车.第4部分:槽形电车线和悬链线用吊索夹
Steel aluminium trolley wire 钢铝电车线
In addition , there are two tramways , with one running along the north shore of hong kong island and the other from central to the peak 除此之外,还有两条有轨电车线,分别为行走港岛北岸的电车及连接中区与山顶的山顶缆车。
With the background of use in contact cable , this thesis introduces cu - cr alloys as studied subject , and from the two ways of solidified process and solidification mechanics , the structure configuration and the behave of separated - out strengthened elements are systematically study under the process of directional solidification 本文就是以电车线的应用为背景,采用cu - cr合金作为研究对象,从凝固工艺和凝固机制两个方面,系统地研究了其在定向凝固工艺下的组织形态及其强化元素的析出行为。