472
It was concluded that , a very narrow interface was formed between the additively manufactured maraging steel and the conventional H13 without forming cracks or discontinuities .
 interface, additively manufactured, steel, H13, forming
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:
 interface, additively manufactured, steel, H13, forming