1911
There are many process parameters the laser power , laser spot size and scanning speed , hatch distance , material properties , powder particle size distribution and powder layer thickness , the strategy , design and orientation of the 3D part and its supports , the scanning and building strategy , etc .
 concept or principle: process parameters; process parameter: laser power; process parameter: laser spot size; process parameter: scanning speed; process parameter: hatch distance; concept or principle: material properties; material: powder particle; concept or principle: distribution; material: powder; process parameter: layer thickness; engineering feature: design; concept or principle: orientation; application: 3D part; application: supports; concept or principle: scanning
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: process parameters; process parameter: laser power; process parameter: laser spot size; process parameter: scanning speed; process parameter: hatch distance; concept or principle: material properties; material: powder particle; concept or principle: distribution; material: powder; process parameter: layer thickness; engineering feature: design; concept or principle: orientation; application: 3D part; application: supports; concept or principle: scanning