sentence: Some cables contain both electrical wires and optical fibers.
sentences_before: A 'cable' is made of many wires or optical fibers twisted together to make a larger wire. Each of these wires may be covered.
sentences_after: There are many kinds of cables, including coaxial cables which block out radio or magnetic interference from other wires or cables, by having one wire inside an insulated tube surrounded by a second wire, acting as a metal tube along the same axis. Wire ropes are a common type of cable.
concept_name: cable
headings: Cable
categories: Hardware (mechanical)