2046
Freeform 3D surface topologies can be formed by a set of 2-manifold polygonal sub meshes as shown in 24 .
 concept or principle: Freeform 3D; concept or principle: topologies; material: be; application: set; 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:
 concept or principle: Freeform 3D; concept or principle: topologies; material: be; application: set; material: as