Audio signals can be transmitted along cables without distortion.声音信号可以通过电缆传送而不失真。8,000 homes were plunged into darkness as electricity cables crashed down.由于电缆损毁，8,000户家庭顿时落入一片黑暗之中。The cables are all bright yellow to pr...
The components of a suspension bridge are: flexible cables, towers, anchorages, suspenders, deck and stiffening trusses.悬索桥有下列构件: 柔性索缆 、 索塔 、 锚固件 、 吊杆 、 桥面、加劲桁架.Helically wound multi - filar cables and braids now predomi...