6953
The transient temperature and velocity fields during single-track and multi-track laser PBF were computed considering the melting and solidification of the powder feedstocks .
 concept or principle: transient; process parameter: temperature; enabling technology: laser; manufacturing process: melting; concept or principle: solidification; machine or equipment: powder feedstocks
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: transient, temperature, laser, melting, solidification, powder feedstocks 
Answer:
 concept or principle: transient; process parameter: temperature; enabling technology: laser; manufacturing process: melting; concept or principle: solidification; machine or equipment: powder feedstocks