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The perimeters of each layer ( including the internal features ) were extracted based on the intersections between the slicing surface and the 3D model , and infill toolpaths were created by projecting 2D patterns reflecting the features to be printed with a desired fill factor ( in the x–y plane ) onto the slicing surface to create 3D patterns .
 process parameter: layer; concept or principle: extracted; concept or principle: slicing; application: 3D model; process parameter: infill; engineering feature: 2D patterns; material: be; concept or principle: slicing; concept or principle: 3D
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: layer, extracted, slicing, 3D model, infill, 2D patterns, be, slicing, 3D 
Answer:
 process parameter: layer; concept or principle: extracted; concept or principle: slicing; application: 3D model; process parameter: infill; engineering feature: 2D patterns; material: be; concept or principle: slicing; concept or principle: 3D