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The results show that due to the influences of thermal accumulation , the layer ’ s surface oxidation , microstructural evolution , grain size , and crystalline phase vary along the building direction of the aB-fabricated wall , which creates variations in mechanical properties and fracture features .
 process parameter: layer; material: s; manufacturing process: oxidation; concept or principle: microstructural evolution; machanical property: grain size; concept or principle: phase; process parameter: building direction; concept or principle: variations; concept or principle: mechanical properties; concept or principle: fracture
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: layer, s, oxidation, microstructural evolution, grain size, phase, building direction, variations, mechanical properties, fracture 
Answer:
 process parameter: layer; material: s; manufacturing process: oxidation; concept or principle: microstructural evolution; machanical property: grain size; concept or principle: phase; process parameter: building direction; concept or principle: variations; concept or principle: mechanical properties; concept or principle: fracture