949
These pre-machined features can be stacked layer-by-layer to create pockets for the accommodation of fragile components , such as electronic circuitry , prior to encapsulation .
 material: be; concept or principle: layer-by-layer; concept or principle: fragile; machine or equipment: components; material: as; concept or principle: encapsulation
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: be; concept or principle: layer-by-layer; concept or principle: fragile; machine or equipment: components; material: as; concept or principle: encapsulation