6903
With increasing build time and build chamber temperature the average molecular weight is rising , whereby the influence of build time is more significant .
 process parameter: build time; process parameter: build chamber; concept or principle: average; process parameter: weight; process parameter: build time
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: 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} 
 Entities: build time, build chamber, average, weight, build time 
Answer:
 process parameter: build time; process parameter: build chamber; concept or principle: average; process parameter: weight; process parameter: build time