7548
They spread the least during orthogonal printing , i.e. , when the direction of the printing velocity is perpendicular to the direction of fiber alignment .
 concept or principle: spread; engineering feature: fiber alignment
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: spread, fiber alignment 
Answer:
 concept or principle: spread; engineering feature: fiber alignment