2741
Premelting electron beam-assisted freeform fabrication , as a new method to avoid the direct coupling of wire-beam-molten pool during electron beam freeform fabrication , is proposed for the first time .
 manufacturing process: freeform fabrication; material: as; manufacturing process: electron beam freeform fabrication
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: freeform fabrication, as, electron beam freeform fabrication 
Answer:
 manufacturing process: freeform fabrication; material: as; manufacturing process: electron beam freeform fabrication