9432
At present , dies are manufactured by machining with following bulk heat treatment , which is an expensive process .
 dies, manufactured, machining, bulk heat treatment, process
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:
 dies, manufactured, machining, bulk heat treatment, process