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Herein , a novel design strategy is proposed for the lattice unit cell configurations , including triangular prism ( T ) , quadrangular prism ( Q ) and hexagonal prism ( H ) , by considering the tight spatial arrangement and manufacturing constraints .
 design, lattice unit, cell, hexagonal, manufacturing constraints
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 design, lattice unit, cell, hexagonal, manufacturing constraints