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The proposed approach is based on projecting mask images with a new two-channel system design which reduces the separation force between a cured layer and the resin vat .
 concept or principle: mask images; concept or principle: two-channel; engineering feature: design; concept or principle: separation force; concept or principle: cured layer; machine or equipment: resin vat
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: mask images; concept or principle: two-channel; engineering feature: design; concept or principle: separation force; concept or principle: cured layer; machine or equipment: resin vat