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Despite the access to complexity and freedom of design , which is often cited for AM , all the biomimetic approaches discussed here have practical manufacturability limits in the context of present-day AM systems .
 concept or principle: complexity; engineering feature: design; manufacturing process: AM; concept or principle: biomimetic; concept or principle: manufacturability limits; manufacturing process: AM
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: complexity; engineering feature: design; manufacturing process: AM; concept or principle: biomimetic; concept or principle: manufacturability limits; manufacturing process: AM