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Powder bed fusion and vat polymerization origin lower layer thicknesses due to the ability to precisely focus the energy beam radius .
 manufacturing process: Powder bed fusion; manufacturing process: vat polymerization; process parameter: layer thicknesses; process parameter: energy beam radius
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: Powder bed fusion; manufacturing process: vat polymerization; process parameter: layer thicknesses; process parameter: energy beam radius