1408
Authors have chosen to classify the technologies according to hardening system or melting system which are characterised by a laser , a flashing source , an extrusion or a jetting .
 concept or principle: technologies; machine or equipment: hardening system; machine or equipment: melting system; enabling technology: laser; concept or principle: flashing source; manufacturing process: extrusion; manufacturing process: jetting
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: technologies; machine or equipment: hardening system; machine or equipment: melting system; enabling technology: laser; concept or principle: flashing source; manufacturing process: extrusion; manufacturing process: jetting