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4.2.4 Direct energy deposition techniques Direct energy deposition is a more complex additive printing process , commonly used to repair or add additional material to existing components .
 manufacturing process: Direct energy deposition; manufacturing process: Direct energy deposition; material: additive; concept or principle: process; material: material; machine or equipment: components
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: Direct energy deposition; manufacturing process: Direct energy deposition; material: additive; concept or principle: process; material: material; machine or equipment: components