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Development orientations show that the new 3D printers will be more integrated inside the production line with the automation and the connectivity with the digital chain .
 concept or principle: orientations; machine or equipment: 3D printers; material: be; manufacturing process: production line; concept or principle: automation; enabling technology: digital chain
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: orientations; machine or equipment: 3D printers; material: be; manufacturing process: production line; concept or principle: automation; enabling technology: digital chain