3035
Electron beam welding ( EBW ) is a high-density energy ( low heat input ) welding technique , resulting in a narrow heat affected zone ( HAZ ) , causing minimal metallurgical changes in the workpieces .
 manufacturing process: Electron beam welding; manufacturing process: EBW; concept or principle: heat; manufacturing process: welding; concept or principle: heat affected zone; concept or principle: HAZ; application: metallurgical
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: 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} 
 Entities: Electron beam welding, EBW, heat, welding, heat affected zone, HAZ, metallurgical 
Answer:
 manufacturing process: Electron beam welding; manufacturing process: EBW; concept or principle: heat; manufacturing process: welding; concept or principle: heat affected zone; concept or principle: HAZ; application: metallurgical