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This paper describes how quantitative design guidelines are compiled for a polymer selective laser sintering ( SLS ) process via a metrology study .
 concept or principle: quantitative; engineering feature: design; material: polymer; manufacturing process: laser sintering; manufacturing process: SLS; concept or principle: process; concept or principle: metrology
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: quantitative, design, polymer, laser sintering, SLS, process, metrology 
Answer:
 concept or principle: quantitative; engineering feature: design; material: polymer; manufacturing process: laser sintering; manufacturing process: SLS; concept or principle: process; concept or principle: metrology