4654
Maximum surface roughness is reduced by 54 % and the number of layers with increased surface roughness relative to the steady-state value is reduced by 60 % .
 machanical property: surface roughness; process parameter: number of layers; machanical property: surface roughness
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, number of layers, surface roughness 
Answer:
 machanical property: surface roughness; process parameter: number of layers; machanical property: surface roughness