光纤电缆

optical fiber / optical cable

light / ray / CL:道[dao4] / bright / only / merely / to use up

optical fiber / fiber optics

boatman's tow-rope

fine / delicate / minute

lightning / electricity / electric (bound form) / to get (or give) an electric shock / phone call or telegram etc / to send via telephone or telegram etc

(electric) cable

cable / hawser / to moor