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5 Heat-treatment and surface modification of porous metallic structures produced by AM 5.1 Heat-treatment The mechanical properties of AM produced materials depend heavily on the processing parameters , including building layer thickness , scan speed , energy density and focal offset distance .
 manufacturing process: surface modification; engineering feature: porous metallic structures; manufacturing process: AM; concept or principle: mechanical properties; manufacturing process: AM; concept or principle: materials; concept or principle: parameters; process parameter: building layer thickness; process parameter: scan speed; process parameter: energy density; process parameter: focal offset distance
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:
 manufacturing process: surface modification; engineering feature: porous metallic structures; manufacturing process: AM; concept or principle: mechanical properties; manufacturing process: AM; concept or principle: materials; concept or principle: parameters; process parameter: building layer thickness; process parameter: scan speed; process parameter: energy density; process parameter: focal offset distance