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9.2 Product design for AM goals Topology optimization enables strategies that go beyond lightweight design to include minimizing support usage and thermal deformation , optimizing local heat input , and with that the local material properties , porosity and strength .
 engineering feature: Product design; manufacturing process: AM; engineering feature: Topology optimization; material: go; concept or principle: lightweight; engineering feature: design; application: support; process characterization: thermal deformation; concept or principle: local heat input; concept or principle: material properties; machanical property: porosity; machanical property: strength
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:
 engineering feature: Product design; manufacturing process: AM; engineering feature: Topology optimization; material: go; concept or principle: lightweight; engineering feature: design; application: support; process characterization: thermal deformation; concept or principle: local heat input; concept or principle: material properties; machanical property: porosity; machanical property: strength