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Blacksmith puts the red-hot forged metal part into cold water , close-up
Girl drinks clear mineral water after training, sunset in sun. Sports Outdoor, Quench your thirst with cool water. Young Woman drinks refreshing water from bottle, training, park, nature. Silhouette
Quenching Oil Heat-treating oil used to cool metal rapidly after heating, controlling the hardness of the material.
Induction hardening type of surface hardening . Metal part is induction-heated and then quenched. Quenched metal. Induction heating  process. Electromagnetic induction. Surface hardening of steel.

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girl drinking water from a bottleImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/girl-drinking-water-bottle-448843">Image used under license from Freestock.com</a>