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However , for LPBF parts with complex shapes and fine features or lattice structures , full powder evacuation and targeted accuracy and roughness values can be quite difficult to obtain .
 manufacturing process: LPBF; machanical property: complex shapes; engineering feature: lattice structures; material: powder; process characterization: accuracy; machanical property: roughness values; material: be
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:
 manufacturing process: LPBF; machanical property: complex shapes; engineering feature: lattice structures; material: powder; process characterization: accuracy; machanical property: roughness values; material: be