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The experimental results show solidification of metal powders in forms of spheres and rods ( of ∼2 mm diameter ) and extension of these rods by adding batches of powder and consolidating them locally as building blocks by LMH .
 concept or principle: experimental; concept or principle: solidification; material: metal powders; manufacturing process: mm; concept or principle: diameter; material: powder; material: as
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: experimental, solidification, metal powders, mm, diameter, powder, as 
Answer:
 concept or principle: experimental; concept or principle: solidification; material: metal powders; manufacturing process: mm; concept or principle: diameter; material: powder; material: as