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In this paper we report upon the combined effects of PBF parameters , including power and scan speed , in layer-by-layer manufacturing of gas atomized non-modulated ( NM ) Ni-Mn-Ga alloy .
 PBF, parameters, power, scan speed, layer-by-layer, gas atomized, alloy
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:
 PBF, parameters, power, scan speed, layer-by-layer, gas atomized, alloy