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This paper proposes an additive manufacturing method that combines fused filament fabrication ( FFF ) 3D printing and an electroforming technology to fabricate multi-material structures composed of resin and metal .
 manufacturing process: additive manufacturing; manufacturing process: fused filament fabrication; manufacturing process: FFF; manufacturing process: 3D printing; manufacturing process: electroforming; manufacturing process: fabricate; material: resin; material: metal
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: additive manufacturing, fused filament fabrication, FFF, 3D printing, electroforming, fabricate, resin, metal 
Answer:
 manufacturing process: additive manufacturing; manufacturing process: fused filament fabrication; manufacturing process: FFF; manufacturing process: 3D printing; manufacturing process: electroforming; manufacturing process: fabricate; material: resin; material: metal