1021
As the role of anisotropy for topology optimisation in AM was discussed in , elucidating that this research is still in its infancy and requiring more fundamental investigations for a critical review , this paper summarizes the more consolidated knowledge in this field .
 material: As; machanical property: anisotropy; engineering feature: topology optimisation; manufacturing process: AM; concept or principle: research
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:
 material: As; machanical property: anisotropy; engineering feature: topology optimisation; manufacturing process: AM; concept or principle: research