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By conducting these tests , it was found that despite having approximately double the resistivity of commercially pure copper , the resistivity was sufficiently low enough to demonstrate the potential to use AM to process copper suitable for electrical applications .
 resistivity, copper, resistivity, AM, process, copper, electrical applications
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:
 resistivity, copper, resistivity, AM, process, copper, electrical applications