| hardening |
Torches are used to harden materials through annealing, case hardening and tempering.
출처: www.bernzomatic.com/bernzomatic/consumer/jhtml/glo...
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| hardening |
Achieved by heating the material and quenching it in oil to give durability. Flame hardining and Induction hardening are two methods used.
출처: www.aperaceparts.com/tech/camterminology.html
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| hardening |
is the process by which a plant or tissue is made more resistant to any environmental extreme such as low temperature.
출처: mtngrv.smsu.edu/Hardiness/Terms.htm
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