7096
It has been found that functionally graded support structures can maintain a higher temperature level than the conventional uniform support structure at the bottom of overhang , which is equivalent to an extra pre-heating effect .
 concept or principle: functionally graded; process parameter: temperature; engineering feature: support structure; process parameter: overhang
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: functionally graded, temperature, support structure, overhang 
Answer:
 concept or principle: functionally graded; process parameter: temperature; engineering feature: support structure; process parameter: overhang