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Nguyen manufactured porous Mg alloys using SLM and suggested that the dimension , surface morphology and the oxygen pick-up of the laser-melted Mg were strongly dependent on the laser processing parameters .
 concept or principle: manufactured; material: Mg alloys; manufacturing process: SLM; engineering feature: dimension; process characterization: surface morphology; material: oxygen; material: Mg; concept or principle: laser processing
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 concept or principle: manufactured; material: Mg alloys; manufacturing process: SLM; engineering feature: dimension; process characterization: surface morphology; material: oxygen; material: Mg; concept or principle: laser processing