972
This elicits local variations in the melt pool size , shape , or temperature , particularly near sharp geometric features or overhang structures due to the relatively higher thermal conductivity of solid metal compared to metal powder .
 variations, melt pool, temperature, overhang, thermal conductivity, metal, metal powder
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:
 variations, melt pool, temperature, overhang, thermal conductivity, metal, metal powder