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Then the effect of process parameters comprising laser power , scan speed , hatch space , laser pattern angle coupling , along with heat treatment as a post-process , in relation to hardness was analysed .
 process parameters, laser power, scan speed, laser, heat treatment, as, post-process, hardness
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:
 process parameters, laser power, scan speed, laser, heat treatment, as, post-process, hardness