What is recoil the heating element for cooking appliance?

Answer 1

FWIW: Here is one answer I learned working with my father in appliance repair.

In older stoves (and probably newer ones) , baking ovens and such, the heating elements at the time consisted of long coiled pieces of nichrome wire that resembled a stretched door spring. These wires were fed through round ceramic doughnut hole type insulator holders mounted on a metal frame. When these elements burned out the element wire would be removed and you could purchase a new one, stretch it out, feed it through all the insulators and terminate the ends to the electrical connector. This was referred to as "Recoiling an element"

Later on preformed metal rode type elements were designed and are primarily used today.