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Significant effects of ILT and build height on heat accumulation , sub-grain sizes , melt pool geometries and hardness are presented .
 build height, heat accumulation, sub-grain sizes, melt pool, geometries, hardness
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:
 build height, heat accumulation, sub-grain sizes, melt pool, geometries, hardness