8708
To further elucidate the fiber alignment as indicated by the surface roughness , a water contact angle hydrophobicity test was conducted to prove that the 0° printed composite showed higher contact angle as compared with the 45° orientation , confirming greater entrapment due to fiber alignment at the surface .
 engineering feature: fiber alignment; material: as; machanical property: surface roughness; application: contact; material: composite; application: contact; material: as; concept or principle: orientation; engineering feature: fiber alignment; concept or principle: surface
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: fiber alignment, as, surface roughness, contact, composite, contact, as, orientation, fiber alignment, surface 
Answer:
 engineering feature: fiber alignment; material: as; machanical property: surface roughness; application: contact; material: composite; application: contact; material: as; concept or principle: orientation; engineering feature: fiber alignment; concept or principle: surface