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This paper proposes a novel geometric based scanning strategy adopted in the selective laser melting ( SLM ) manufacturing technology aimed at reducing the level of residual stresses generated during the build-up process .
 scanning strategy, selective laser melting, SLM, manufacturing technology, residual stresses, process
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:
 scanning strategy, selective laser melting, SLM, manufacturing technology, residual stresses, process