953
This method was used in various works for single material FDM parts containing void , however , certain modifications are needed in order to apply it to multi-material 3D printing .
 material: material; manufacturing process: FDM; concept or principle: void; manufacturing process: multi-material 3D printing
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:
 material: material; manufacturing process: FDM; concept or principle: void; manufacturing process: multi-material 3D printing