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In the work of Maleksaeedi , a powder-bed inkjet 3D-printing and vacuum infiltration process was used for producing alumina parts with high density and improved mechanical properties .
 manufacturing process: inkjet 3D-printing; biomedical: vacuum infiltration process; material: alumina; machanical property: density; concept or principle: mechanical properties
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:
 manufacturing process: inkjet 3D-printing; biomedical: vacuum infiltration process; material: alumina; machanical property: density; concept or principle: mechanical properties