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Companies that sell professional 3D printers include 3D Systems , Stratasys , Solido LTD , Voxeljet and ExOne .
 application: Companies; machine or equipment: 3D printers; application: 3D Systems; application: Stratasys; application: Solido LTD
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:
 application: Companies; machine or equipment: 3D printers; application: 3D Systems; application: Stratasys; application: Solido LTD