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4 shows the sketch of a circular pore with overhanging arc AB , which can be processable if the fabrication angle were larger than the critical value c. Otherwise , supporting structures have to be used , which are normally avoided to prevent damage of parts in post-processing .
 machanical property: pore; process parameter: overhanging arc; material: AB; material: be; manufacturing process: fabrication; material: be; machanical property: damage; concept or principle: post-processing
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:
 machanical property: pore; process parameter: overhanging arc; material: AB; material: be; manufacturing process: fabrication; material: be; machanical property: damage; concept or principle: post-processing