Copper, which is used for electrical wiring in most homes, cars and appliances, is a very efficient conductor of electricity.
(Copper; is used; for electrical wiring; L:in most homes, cars and appliances) (Copper, which is used for electrical wiring in most homes, cars and appliances; is; a very efficient conductor of electricity)
Copper Copper, which is used for electrical wiring in most homes, cars and appliances
is used is
for electrical wiring L:in most homes, cars and appliances
a very efficient conductor of electricity