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In detail , the focus is on the characterization of the surface irregularities by means of various measuring techniques and on the evaluation of the main material mechanical properties , including tensile and compressive strengths , Young 's modulus and post elastic behavior .
 concept or principle: surface; material: material; concept or principle: properties; machanical property: tensile; machanical property: compressive strengths; machanical property: elastic
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: surface; material: material; concept or principle: properties; machanical property: tensile; machanical property: compressive strengths; machanical property: elastic