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Depth-sensing ( instrumented ) indentation testing technique is a robust , reliable , convenient and non-destructive characterization method to study small-scale mechanical properties and rate-dependent plastic deformation in metals and alloys at ambient and elevated temperatures .
 concept or principle: indentation; concept or principle: mechanical properties; machanical property: plastic deformation; material: metals; material: alloys; process parameter: temperatures
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: indentation, mechanical properties, plastic deformation, metals, alloys, temperatures 
Answer:
 concept or principle: indentation; concept or principle: mechanical properties; machanical property: plastic deformation; material: metals; material: alloys; process parameter: temperatures