530
For the evaluation of the two programs , calibration and validation geometries were printed by SLM in Ti–6Al–4V and residual deformations have been measured by 3D scanning .
 concept or principle: calibration; concept or principle: validation geometries; manufacturing process: SLM; concept or principle: residual deformations; process characterization: 3D 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: calibration; concept or principle: validation geometries; manufacturing process: SLM; concept or principle: residual deformations; process characterization: 3D scanning