2098
Arie investigated the performance of Ti64 air-water manifold-microchannel heat exchangers .
 concept or principle: performance; material: Ti64; machine or equipment: heat exchangers
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: performance; material: Ti64; machine or equipment: heat exchangers