1907
In addition , it is still not a real 3D TO for AM design since the decomposition and overhang angle control with volume filling still uses 2D operations .
 concept or principle: 3D; manufacturing process: AM; machanical property: decomposition; process parameter: overhang angle; concept or principle: volume; process parameter: 2D operations
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:
 concept or principle: 3D; manufacturing process: AM; machanical property: decomposition; process parameter: overhang angle; concept or principle: volume; process parameter: 2D operations