4520
Laser-induced forward transfer ( LIFT ) , a 3D additive manufacturing technique is implemented to fabricate a fully metallic functional micro device .
 concept or principle: 3D; manufacturing process: manufacturing; manufacturing process: fabricate; material: metallic
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: 3D, manufacturing, fabricate, metallic 
Answer:
 concept or principle: 3D; manufacturing process: manufacturing; manufacturing process: fabricate; material: metallic