6903
With increasing build time and build chamber temperature the average molecular weight is rising , whereby the influence of build time is more significant .
 build time, build chamber, average, weight, build time
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:
 build time, build chamber, average, weight, build time