964
In this high-energy density regime , porosity must originate from mechanisms that are different from the well-known incomplete melting in the low energy density regime .
 machanical property: density; machanical property: porosity; manufacturing process: melting; process parameter: energy density
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: density, porosity, melting, energy density 
Answer:
 machanical property: density; machanical property: porosity; manufacturing process: melting; process parameter: energy density