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The complex residual stress and distortion experienced in wire arc additive manufacturing ( WAAM ) can have a serious impact on production .
 machanical property: residual stress; concept or principle: distortion; manufacturing process: wire arc additive manufacturing; manufacturing process: WAAM; concept or principle: impact; manufacturing process: production
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:
 machanical property: residual stress; concept or principle: distortion; manufacturing process: wire arc additive manufacturing; manufacturing process: WAAM; concept or principle: impact; manufacturing process: production