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We develop a Gaussian procesB-based predictive model for the learning and prediction of the porosity in metallic parts produced using selective laser melting ( SLM – a laser-based AM process ) .
 Gaussian, predictive model, prediction, porosity, metallic parts, selective laser melting, SLM, AM 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:
 Gaussian, predictive model, prediction, porosity, metallic parts, selective laser melting, SLM, AM process