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Seven types of commonly used AM materials with a wide range of thermal conductivities were studied for better testing of the conductivity dependency of the convection coefficient .
 material: AM materials; process parameter: range; machanical property: thermal conductivities; process characterization: testing; machanical property: conductivity
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: AM materials, range, thermal conductivities, testing, conductivity 
Answer:
 material: AM materials; process parameter: range; machanical property: thermal conductivities; process characterization: testing; machanical property: conductivity