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The differences between low and high laser power fabrications , as well as the effects of various post-LENS heat treatments were systematically investigated and discussed .
 laser power, as, as, heat treatments
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:
 laser power, as, as, heat treatments