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In the production of laser based powder bed fusion system was compared to an electron beam variant .
 manufacturing process: production; enabling technology: laser; manufacturing process: powder bed fusion; process characterization: electron beam variant
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:
 manufacturing process: production; enabling technology: laser; manufacturing process: powder bed fusion; process characterization: electron beam variant