1990
Among the many applicable AM methods ( particularly powder bed technologies ) , electron-beam melting ( EBM ) is gaining increased interest mainly in aerospace and medical industries , due to its inherent advantages for the printing of Ti-6Al-4V alloy .
 AM, powder bed, melting, EBM, aerospace, medical industries, Ti-6Al-4V alloy
Please list all entity words in the text that fit the category. Output format is "word1, 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} 
Answer:
 AM, powder bed, melting, EBM, aerospace, medical industries, Ti-6Al-4V alloy