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The structure was effectively enhanced for AM , using a manual post-processing step , in which a partial cellular infill based on Body Centred Cubic unit cells was included to improve the performance under arbitrary loading and to reduce warpage arising from residual stresses in SLM .
 concept or principle: structure; manufacturing process: AM; concept or principle: post-processing; process parameter: infill; concept or principle: Body Centred Cubic; application: cells; concept or principle: performance; concept or principle: warpage; machanical property: residual stresses; manufacturing process: SLM
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: structure; manufacturing process: AM; concept or principle: post-processing; process parameter: infill; concept or principle: Body Centred Cubic; application: cells; concept or principle: performance; concept or principle: warpage; machanical property: residual stresses; manufacturing process: SLM