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With the use of industrial 3D printers capable of fused particle fabrication/ fused granular fabrication ( FPF/FGF ) printing directly from waste plastic streams , green fab labs could act as defacto recycling centers for converting waste plastics into valuable products for their communities .
 application: industrial; machine or equipment: 3D printers; concept or principle: fused; concept or principle: fused; manufacturing process: fabrication; material: plastic; material: as; concept or principle: recycling; material: plastics
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: industrial, 3D printers, fused, fused, fabrication, plastic, as, recycling, plastics 
Answer:
 application: industrial; machine or equipment: 3D printers; concept or principle: fused; concept or principle: fused; manufacturing process: fabrication; material: plastic; material: as; concept or principle: recycling; material: plastics