2072
For mini/micro channels , the feature size may be close to the limitations of the printing device which may result in walls failing to print , channels being blocked and cumbersome removal of excess print material .
 concept or principle: mini/micro channels; process parameter: feature size; material: be; manufacturing process: print; manufacturing process: print; material: material
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: mini/micro channels; process parameter: feature size; material: be; manufacturing process: print; manufacturing process: print; material: material