2053
One of the most widely used applications of biomimetic design in AM is light-weighting , but many other opportunities exist including parts customized for acoustic , thermal , optical or other applications , especially in combination with surface modification techniques .
 engineering feature: biomimetic design; manufacturing process: AM; process characterization: optical; manufacturing process: surface modification
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:
 engineering feature: biomimetic design; manufacturing process: AM; process characterization: optical; manufacturing process: surface modification