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The present work aimed to decrease the surface roughness of maraging steel ( MS ) by selective laser melting ( SLM ) using large pulsed electron-beam ( LPEB ) irradiation as a post-treatment .
 machanical property: surface roughness; material: maraging steel; manufacturing process: selective laser melting; manufacturing process: SLM; manufacturing process: irradiation; material: as; manufacturing process: post-treatment
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: surface roughness, maraging steel, selective laser melting, SLM, irradiation, as, post-treatment 
Answer:
 machanical property: surface roughness; material: maraging steel; manufacturing process: selective laser melting; manufacturing process: SLM; manufacturing process: irradiation; material: as; manufacturing process: post-treatment