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As WAAM matures as a commercial manufacturing process , development of a commercially available WAAM system for metal components is an interdisciplinary challenge , which integrates physical welding process development , materials science and thermo-mechanical engineering , and mechatronic and control system design This study presents a review on powder bed laser additive manufacturing of stainless steel .
 material: As; material: as; manufacturing process: manufacturing process; machine or equipment: WAAM system; material: metal; machine or equipment: components; manufacturing process: welding; concept or principle: process; concept or principle: materials; concept or principle: thermo-mechanical; application: engineering; machine or equipment: control system; manufacturing process: powder bed laser additive manufacturing; 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:
 material: As; material: as; manufacturing process: manufacturing process; machine or equipment: WAAM system; material: metal; machine or equipment: components; manufacturing process: welding; concept or principle: process; concept or principle: materials; concept or principle: thermo-mechanical; application: engineering; machine or equipment: control system; manufacturing process: powder bed laser additive manufacturing; material: stainless steel