1293
Here , the external boundaries of the bounding box were preserved , and the lattice composed of hollow cubic unit cells was mapped onto a SIMP-result .
 engineering feature: boundaries; engineering feature: bounding box; concept or principle: lattice; concept or principle: unit cells
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: boundaries; engineering feature: bounding box; concept or principle: lattice; concept or principle: unit cells