knob-and-tube wiring

例句：

1. 1.The electrical engineer used a knob-and-tube wiring system to connect the lights in the factory.
   这位电气工程师使用了接线管系统来连接工厂里的灯光。
2. 2.The old house had many knob-and-tube wiring, which was difficult to repair.
   这所老房子有许多接线管，修理起来很困难。
3. 3.The new computer has a sleek design with knob-and-tube wiring for easy access to all its components.
   这款新电脑设计简洁，接线管方便用户轻松访问所有组件。