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In terms of custom design especially for implants patient-specific implants are a special category and require a particular workflow involving the processing of medical image data , the use of CAD tools and design for AM knowledge to yield a good resulting implant as discussed in .
 engineering feature: design; application: implants; application: implants; concept or principle: workflow; application: medical; concept or principle: image data; enabling technology: CAD; engineering feature: design; manufacturing process: AM; application: implant; 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; application: implants; application: implants; concept or principle: workflow; application: medical; concept or principle: image data; enabling technology: CAD; engineering feature: design; manufacturing process: AM; application: implant; material: as