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Selective laser melting ( SLM ) is a method of laser powder bed fusion additive manufacturing ( AM ) currently being pursued in numerous industries , including space launch and space flight .
 Selective laser melting, SLM, laser powder bed fusion additive manufacturing, AM, industries
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:
 Selective laser melting, SLM, laser powder bed fusion additive manufacturing, AM, industries