1891
In this work , detailed investigations on the effect of HIP on BJ parts printed from three different powder configurations , which led to varying levels of porosity , are performed .
 HIP, BJ, powder, led, porosity
Please list all entity words in the text that fit the category. Output format is "word1, 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} 
Answer:
 HIP, BJ, powder, led, porosity