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In these specific regions it may be appropriate to grow some of these surfaces in the design phase to provide sufficient machining allowance to ensure high quality , accurate results .
 material: be; concept or principle: surfaces; engineering feature: design; process parameter: machining allowance; concept or principle: quality; process characterization: accurate
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:
 material: be; concept or principle: surfaces; engineering feature: design; process parameter: machining allowance; concept or principle: quality; process characterization: accurate