1302
In order to achieve a polytropic expansion through a reciprocating machine , an extremely compact heat exchanger is designed .
 machine or equipment: machine; manufacturing process: compact; engineering feature: designed
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: machine; manufacturing process: compact; engineering feature: designed