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The proposed system , wire and arc additive manufacturing ( WAAM ) , integrates a cold metal transfer ( CMT ) welding equipment patented by Fronius® , and a CNC milling machine Optimus with three axis and it presents the advantages to reduce the heat accumulation originated using a conventional GMAW equipment and the possibility to implement surface finish operations by milling .
 manufacturing process: wire and arc additive manufacturing; manufacturing process: WAAM; manufacturing process: cold metal transfer; manufacturing process: CMT; manufacturing process: welding; machine or equipment: equipment; manufacturing process: CNC milling; machanical property: heat accumulation; manufacturing process: GMAW; machine or equipment: equipment; engineering feature: surface finish; manufacturing process: milling
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 and arc additive manufacturing; manufacturing process: WAAM; manufacturing process: cold metal transfer; manufacturing process: CMT; manufacturing process: welding; machine or equipment: equipment; manufacturing process: CNC milling; machanical property: heat accumulation; manufacturing process: GMAW; machine or equipment: equipment; engineering feature: surface finish; manufacturing process: milling