7252
After the post heat treatment of the aB-built SLM specimens , more grains nucleated around the inoculants , and Nb-rich precipitates were formed along the grain boundaries .
 manufacturing process: heat treatment; manufacturing process: SLM; concept or principle: grains; material: precipitates; concept or principle: grain boundaries
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: heat treatment, SLM, grains, precipitates, grain boundaries 
Answer:
 manufacturing process: heat treatment; manufacturing process: SLM; concept or principle: grains; material: precipitates; concept or principle: grain boundaries