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Four of the above process categories can directly produce metal parts ; powder bed fusion , directed energy deposition , material jetting , and sheet lamination .
 concept or principle: process; material: metal; manufacturing process: powder bed fusion; manufacturing process: directed energy deposition; manufacturing process: material jetting; manufacturing process: sheet lamination
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:
 concept or principle: process; material: metal; manufacturing process: powder bed fusion; manufacturing process: directed energy deposition; manufacturing process: material jetting; manufacturing process: sheet lamination