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Parameters such as surface roughness , relative density , hardness and transverse rupture strength of printed and sintered samples were compared with those obtained in other 3D printing processes .
 concept or principle: Parameters; material: as; machanical property: roughness; machanical property: relative density; machanical property: hardness; machanical property: transverse rupture strength; manufacturing process: sintered; concept or principle: samples; manufacturing process: 3D printing
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:
 concept or principle: Parameters; material: as; machanical property: roughness; machanical property: relative density; machanical property: hardness; machanical property: transverse rupture strength; manufacturing process: sintered; concept or principle: samples; manufacturing process: 3D printing