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Additive manufacturing ( AM ) technologies are used in three dimensional ( 3D ) printing of parts using thermo-plastic extruders , or laser and electron beam based metal deposition methods .
 manufacturing process: Additive manufacturing; manufacturing process: AM; concept or principle: technologies; concept or principle: 3D; enabling technology: laser; concept or principle: electron beam; concept or principle: metal deposition
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: Additive manufacturing, AM, technologies, 3D, laser, electron beam, metal deposition 
Answer:
 manufacturing process: Additive manufacturing; manufacturing process: AM; concept or principle: technologies; concept or principle: 3D; enabling technology: laser; concept or principle: electron beam; concept or principle: metal deposition