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In this study , Wire Arc Additive Manufacturing ( WAAM ) based Directed Energy Deposition ( DED ) process is used to build two parts , tube and wall from 2209 Duplex Stainless Steel .
 manufacturing process: Wire Arc Additive Manufacturing; manufacturing process: WAAM; manufacturing process: Directed Energy Deposition; manufacturing process: DED; concept or principle: process; process parameter: build; material: Stainless Steel
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: Wire Arc Additive Manufacturing; manufacturing process: WAAM; manufacturing process: Directed Energy Deposition; manufacturing process: DED; concept or principle: process; process parameter: build; material: Stainless Steel