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Modelling the thermal behaviour of the melt pool produced in Laser Powder-Bed Fusion ( L-PBF ) processes is not an easy task , as many complex non-linear thermal phenomena are involved .
 Modelling, melt pool, Laser, Fusion, L-PBF, processes, as
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:
 Modelling, melt pool, Laser, Fusion, L-PBF, processes, as