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The heat exchanger core with a size of 66 mm × 74 mm × 27 mm was fabricated as a single piece through the direct metal laser sintering process .
 machine or equipment: heat exchanger; machine or equipment: core; manufacturing process: mm; manufacturing process: mm; manufacturing process: mm; concept or principle: fabricated; material: as; manufacturing process: direct metal laser sintering
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:
 machine or equipment: heat exchanger; machine or equipment: core; manufacturing process: mm; manufacturing process: mm; manufacturing process: mm; concept or principle: fabricated; material: as; manufacturing process: direct metal laser sintering