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Additive metal manufacturing techniques , in particular laser-based powder bed fusion methods , are revolutionary in their capabilities to fabricating new classes of lightweight and complex materials called metallic microlattices .
 material: Additive; manufacturing process: manufacturing; manufacturing process: powder bed fusion; manufacturing process: fabricating; concept or principle: lightweight; concept or principle: materials; material: metallic
Please list all entity words in the text that fit the category.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} 
Answer:
 material: Additive; manufacturing process: manufacturing; manufacturing process: powder bed fusion; manufacturing process: fabricating; concept or principle: lightweight; concept or principle: materials; material: metallic