7893
For this flexible and extensible 3D printing system , the influences of the multi-robot layout on the maximum reachable area and the geometry adaptability are discussed .
 manufacturing process: 3D printing; concept or principle: layout; process parameter: area; concept or principle: geometry
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: 3D printing, layout, area, geometry 
Answer:
 manufacturing process: 3D printing; concept or principle: layout; process parameter: area; concept or principle: geometry