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Electroforming the interior of a printed resin mold enables the fabrication of multi-material structures using resin and metal materials .
 manufacturing process: Electroforming; concept or principle: printed resin; machine or equipment: mold; manufacturing process: fabrication; engineering feature: multi-material structures; material: resin; material: metal materials
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: Electroforming, printed resin, mold, fabrication, multi-material structures, resin, metal materials 
Answer:
 manufacturing process: Electroforming; concept or principle: printed resin; machine or equipment: mold; manufacturing process: fabrication; engineering feature: multi-material structures; material: resin; material: metal materials