2690
The observation of sub-grained cellular features in additively manufactured ( AM ) /selectively laser melted ( SLM ) 316L stainless steel components has remained an interesting , though incompletely understood phenomenon .
 additively manufactured, AM, laser, SLM, 316L stainless steel
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:
 additively manufactured, AM, laser, SLM, 316L stainless steel