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It is also demonstrated that laser powder bed fusion is a flexible fabrication method for the ceration of structures with different thicknesses , hole geometry and tapered openings , allowing the acoustic properties to be modified .
 manufacturing process: laser powder bed fusion; manufacturing process: fabrication; concept or principle: geometry; concept or principle: properties; material: be
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: laser powder bed fusion, fabrication, geometry, properties, be 
Answer:
 manufacturing process: laser powder bed fusion; manufacturing process: fabrication; concept or principle: geometry; concept or principle: properties; material: be