switchboard operator; a person who handles telephone calls at a switchboard

An electrical device used to extend the reach and number of available outlets; also known as [[插排|插排|cha1 pai2]] or [[排插|排插|pai2 cha1]].

person who operates a telephone switchboard and connects calls; also called [[话务员|話務員|hua4 wu4 yuan2]] or [[接线员|接線員|jie1 xian4 yuan2]]

A straight line connecting two points, specifically in a mathematical context

wiring diagram; hookup

a container used in electrical wiring to house wire connections and protect them from the environment

the electrical connection to a vehicle's metal chassis to complete a circuit