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Actually , optimizing the functionality of supports for 3D structures to be printed by metallic AM processes would be a more important goal than optimizing material savings , since the support structures in metallic AM processes have a profound impact on the final printing quality .
 application: supports; concept or principle: 3D structures; material: be; manufacturing process: metallic AM; material: be; material: material; engineering feature: support structures; manufacturing process: metallic AM; concept or principle: impact; concept or principle: quality
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:
 application: supports; concept or principle: 3D structures; material: be; manufacturing process: metallic AM; material: be; material: material; engineering feature: support structures; manufacturing process: metallic AM; concept or principle: impact; concept or principle: quality