600
Moreover , good understanding of the change in mechanical properties in AM process may assist more accurate optimal design in topology optimization procedure .
 concept or principle: mechanical properties; manufacturing process: AM process; process characterization: accurate; engineering feature: design; engineering feature: topology optimization
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: mechanical properties; manufacturing process: AM process; process characterization: accurate; engineering feature: design; engineering feature: topology optimization