2052
Similar to other existing 3D porous structure design methods , this tool is mainly based on Voronoi tessellation and curve fitting methods .
 concept or principle: 3D; engineering feature: structure design; machine or equipment: tool; engineering feature: Voronoi tessellation
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: 3D; engineering feature: structure design; machine or equipment: tool; engineering feature: Voronoi tessellation