9263
An increase in layer thickness and decrease in strain rate resulted in lower strength , stiffness and higher fracture strains .
 layer thickness, strain rate, strength, stiffness, fracture
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:
 layer thickness, strain rate, strength, stiffness, fracture