815
As the vapor plume , and how effectively it is removed by the shielding gas flow , have a significant effect on the melt pool geometry in laser powder bed fusion , models aiming at predicting the melt pool geometry and attempts to transfer process parameters from one machine to another should consider the effect of the shielding gas flow .
 As, gas, melt pool, geometry, laser powder bed fusion, melt pool, geometry, process parameters, machine, gas
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:
 As, gas, melt pool, geometry, laser powder bed fusion, melt pool, geometry, process parameters, machine, gas