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In this study , novel 3D printed TCP and MgO/ZnO-TCP scaffolds were prepared by an binder-jet 3D printer .
 manufacturing process: 3D printed; engineering feature: scaffolds; machine or equipment: 3D printer
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: 3D printed, scaffolds, 3D printer 
Answer:
 manufacturing process: 3D printed; engineering feature: scaffolds; machine or equipment: 3D printer