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However , the mechanical properties of parts produced with MEAM are lower than bulk material properties because of the interfaces between roads and layers inherent to the additive build technique of MEAM .
 concept or principle: mechanical properties; concept or principle: material properties; material: additive
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: mechanical properties, material properties, additive 
Answer:
 concept or principle: mechanical properties; concept or principle: material properties; material: additive