1883
When introducing extra AM related constraints such as support structures/overhangs , minimum printable features , anisotropic material properties , heat-transfer , thermal strain/stress into TO , this would result in more complex constraints or boundary conditions .
 manufacturing process: AM; material: as; machanical property: anisotropic material properties; concept or principle: boundary conditions
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:
 manufacturing process: AM; material: as; machanical property: anisotropic material properties; concept or principle: boundary conditions