9025
Mechanical properties did not show any significant variation , which is attributed to the low range of the porosity deviation ( less than 5 % ) .
 concept or principle: Mechanical properties; concept or principle: variation; process parameter: range; machanical property: porosity
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: Mechanical properties, variation, range, porosity 
Answer:
 concept or principle: Mechanical properties; concept or principle: variation; process parameter: range; machanical property: porosity