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Robotic wire arc additive manufacturing ( WAAM ) technology has been widely employed to fabricate medium to large scale metallic components .
 manufacturing process: wire arc additive manufacturing; manufacturing process: WAAM; concept or principle: technology; manufacturing process: fabricate; material: metallic; 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: wire arc additive manufacturing; manufacturing process: WAAM; concept or principle: technology; manufacturing process: fabricate; material: metallic; machine or equipment: components