1026
The best impregnation method was then used to prepare tensile , flexural and compressive samples for additional evaluation of each resin .
 impregnation, tensile, samples, resin
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:
 impregnation, tensile, samples, resin