1030
Some effort has been spent in the quest of an efficient in-process flaw inspection , however , no conventional nondestructive testing ( NDT ) approach has been fully satisfying yet .
 concept or principle: flaw; process characterization: nondestructive testing; concept or principle: NDT
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: flaw; process characterization: nondestructive testing; concept or principle: NDT