1497
The viscosity of the slurries was adjusted from ∼35 Pa-s to ∼1000 Pa-s by adjusting pH from ∼9 to ∼4 , resulting in a paste that is suitable for extrusion , which retains near-net geometry .
 machanical property: viscosity; concept or principle: pH; manufacturing process: extrusion; concept or principle: geometry
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: viscosity, pH, extrusion, geometry 
Answer:
 machanical property: viscosity; concept or principle: pH; manufacturing process: extrusion; concept or principle: geometry