723
In the proposed method , the wire material is melted by arc discharge , and the molten metal is subsequently solidified and accumulated .
 material, melted, arc, molten metal
Please list all entity words in the text that fit the category. Output format is "word1, 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, melted, arc, molten metal