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pre-treatment
A mechanical biological treatment (MBT) system is a type of waste processing facility that combines a sorting facility with a form of biological treatment such as composting or anaerobic digestion. MBT plants are designed to process mixed household waste as well as commercial and industrial wastes.
The following are the purpose of heat treatment of metals EXCEPT:
Group of answer choices
to reduce external stress
to improve corrosion resistance
to increase ductility
to enhance strength