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Recycling metal powders in the Additive Manufacturing ( AM ) process is an important consideration in affordability with reference to traditional manufacturing .
 concept or principle: Recycling; material: metal powders; manufacturing process: Additive Manufacturing; manufacturing process: AM; concept or principle: process; manufacturing process: traditional manufacturing
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: Recycling, metal powders, Additive Manufacturing, AM, process, traditional manufacturing 
Answer:
 concept or principle: Recycling; material: metal powders; manufacturing process: Additive Manufacturing; manufacturing process: AM; concept or principle: process; manufacturing process: traditional manufacturing