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Dimensional accuracy is critical in the production of dental pieces , because these must fit tightly the needs of each patient .
 process characterization: Dimensional accuracy; manufacturing process: production; machine or equipment: dental pieces; concept or principle: fit
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:
 process characterization: Dimensional accuracy; manufacturing process: production; machine or equipment: dental pieces; concept or principle: fit