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Results show that flexural strength , modulus and ductility are influenced by laser energy density and flexural strength and modulus of 1.37 MPa and 32.12 MPa respectively are still achievable at a lower laser energy density of 0.016 J/mm2 ( Laser power of 6 W ) .
 machanical property: flexural strength; machanical property: ductility; process parameter: laser energy density; machanical property: flexural strength; concept or principle: MPa; concept or principle: MPa; process parameter: laser energy density; process parameter: Laser power
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: flexural strength, ductility, laser energy density, flexural strength, MPa, MPa, laser energy density, Laser power 
Answer:
 machanical property: flexural strength; machanical property: ductility; process parameter: laser energy density; machanical property: flexural strength; concept or principle: MPa; concept or principle: MPa; process parameter: laser energy density; process parameter: Laser power