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The heat evolution , thermal cycle feature , and temperature gradient in molten pool and deposited layers are revealed .
 concept or principle: heat evolution; process parameter: thermal cycle; engineering feature: feature; process parameter: temperature gradient; concept or principle: molten pool; process characterization: deposited layers
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: heat evolution, thermal cycle, feature, temperature gradient, molten pool, deposited layers 
Answer:
 concept or principle: heat evolution; process parameter: thermal cycle; engineering feature: feature; process parameter: temperature gradient; concept or principle: molten pool; process characterization: deposited layers