3435
A new laser metal desposition process based on an inside-laser coaxial powder feeding system was successfully applied to manufacture reduced activation steel , which is featured with fine microstructure and excellent mechanical properties .
 enabling technology: laser; concept or principle: process; machine or equipment: powder feeding system; concept or principle: manufacture; material: steel; concept or principle: microstructure; concept or principle: mechanical properties
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: laser, process, powder feeding system, manufacture, steel, microstructure, mechanical properties 
Answer:
 enabling technology: laser; concept or principle: process; machine or equipment: powder feeding system; concept or principle: manufacture; material: steel; concept or principle: microstructure; concept or principle: mechanical properties