steel and aluminium trolley wire

例句：

1. 1. The newsteel and aluminum trolley wire is moredurable than the old one.
   新的钢和铝电车线比旧的更耐用。
2. 2.The steel and aluminum trolley wire wasused to connect the trams together.
   钢和铝电车线被用来连接电车。
3. 3. The steel and aluminum trolley wirewas installed by a professional electrician.
   钢和铝电车线由一名专业电工安装。