2106
Parts were created using three different scanning strategies scanning lines , and rotating scanning patterns for each new layer ) and by modifying the hatch distance hd .
 concept or principle: scanning strategies; concept or principle: scanning; process parameter: scanning patterns; process parameter: layer; process parameter: hatch distance
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: scanning strategies; concept or principle: scanning; process parameter: scanning patterns; process parameter: layer; process parameter: hatch distance