844
The tape strips were placed layer by layer using a CO2 laser beam and consolidation roller , prior to laser cutting of each layer .
 concept or principle: layer by layer; material: CO2; machine or equipment: beam; concept or principle: consolidation; manufacturing process: laser cutting; process parameter: layer
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: layer by layer; material: CO2; machine or equipment: beam; concept or principle: consolidation; manufacturing process: laser cutting; process parameter: layer