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Powder quality in additive manufacturing ( AM ) electron beam melting ( EBM ) of Ti-6Al-4V components is crucial in determining the critical material properties of the end item .
 material: Powder; manufacturing process: additive manufacturing; manufacturing process: AM; manufacturing process: electron beam melting; manufacturing process: EBM; material: Ti-6Al-4V; machine or equipment: components; concept or principle: material properties
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: Powder, additive manufacturing, AM, electron beam melting, EBM, Ti-6Al-4V, components, material properties 
Answer:
 material: Powder; manufacturing process: additive manufacturing; manufacturing process: AM; manufacturing process: electron beam melting; manufacturing process: EBM; material: Ti-6Al-4V; machine or equipment: components; concept or principle: material properties