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Manufacturing of extruded 2D lattices is straightforward for most printing technologies , however , 3D cellular structures can pose a challenge for e.g .
 manufacturing process: Manufacturing; manufacturing process: extruded; concept or principle: 2D; enabling technology: printing technologies; engineering feature: 3D cellular structures
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: Manufacturing; manufacturing process: extruded; concept or principle: 2D; enabling technology: printing technologies; engineering feature: 3D cellular structures