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Selection of the most suitable welding WAAM process for the deposition material can ensure manufacturing process stability and contribute to reduction of defects .
 manufacturing process: welding WAAM; concept or principle: process; material: deposition material; manufacturing process: manufacturing process; concept or principle: reduction; concept or principle: defects
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: welding WAAM; concept or principle: process; material: deposition material; manufacturing process: manufacturing process; concept or principle: reduction; concept or principle: defects