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The resultant mixture was used for PBF at laser power values of 200 , 300 and 400 W. The prepared samples were characterised by synchrotron-based X-ray computed tomography to observe their pore distribution and morphology .
 manufacturing process: PBF; process parameter: laser power; concept or principle: samples; process characterization: X-ray computed tomography; machanical property: pore; concept or principle: distribution; concept or principle: morphology
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: PBF, laser power, samples, X-ray computed tomography, pore, distribution, morphology 
Answer:
 manufacturing process: PBF; process parameter: laser power; concept or principle: samples; process characterization: X-ray computed tomography; machanical property: pore; concept or principle: distribution; concept or principle: morphology