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Cutting forces within the MMC region are found to increase by as much as 40 % which has been subsequently related to the periodic changes in microstructure generated by the layer by layer build strategy .
 Cutting forces, MMC, as, as, microstructure, layer by layer, build strategy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 Cutting forces, MMC, as, as, microstructure, layer by layer, build strategy