7220
Post-cured tensile specimens in ZXY orientation had higher tensile strength when printed at 23 °C , because higher over-polymerization led to a smoother surface of the specimens .
 machine or equipment: tensile specimens; concept or principle: orientation; machanical property: tensile strength; application: led; concept or principle: surface
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: tensile specimens, orientation, tensile strength, led, surface 
Answer:
 machine or equipment: tensile specimens; concept or principle: orientation; machanical property: tensile strength; application: led; concept or principle: surface