1084
Interpreting density-based TO solutions , even when they are discrete , poses a bottleneck for post-processes such as shape optimisation or the use of CAD programs for the conversion into AM-compatible file formats .
 concept or principle: bottleneck; material: as; enabling technology: CAD; manufacturing standard: file
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:
 concept or principle: bottleneck; material: as; enabling technology: CAD; manufacturing standard: file