1898
These thin-strut lattices also have relatively large surface roughness values compared to the strut thickness , which understandably affects the mechanical properties more than would be expected for a thicker-strut version .
 concept or principle: lattices; machanical property: surface roughness; process parameter: strut thickness; concept or principle: mechanical properties; material: be
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: lattices; machanical property: surface roughness; process parameter: strut thickness; concept or principle: mechanical properties; material: be