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These guidelines cover aspects related to AM-based design of medical devices as well as how they are manufactured and validated .
 engineering feature: design; application: medical devices; material: as; material: as; concept or principle: manufactured
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: medical devices; material: as; material: as; concept or principle: manufactured