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Typical traditional design strategies of periodic bone scaffolds include Computer Aided Design , image-based design and implicit surfaces , as illustrated in 3 .
 engineering feature: design; biomedical: bone scaffolds; enabling technology: Computer Aided Design; engineering feature: design; engineering feature: implicit surfaces; material: as
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: design; biomedical: bone scaffolds; enabling technology: Computer Aided Design; engineering feature: design; engineering feature: implicit surfaces; material: as