2177
When compared to the aB-built parts , the combination of pre-sintering at 1350 °C and subsequent bronze infiltration led to a significant increase in the tensile properties exhibiting a maximum tensile yield strength and ultimate tensile strength of ∼ 647 and ∼ 1053 MPa , respectively .
 pre-sintering, bronze, led, tensile properties, tensile, strength, ultimate tensile strength, MPa
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:
 pre-sintering, bronze, led, tensile properties, tensile, strength, ultimate tensile strength, MPa