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Manufacture of a structurally sound , defect free , reliable part requires an understanding of the available process options , their underlying physical processes , feedstock materials , process control methods and an appreciation of the causes of the various common defects and their remedies .
 concept or principle: Manufacture; concept or principle: defect; concept or principle: process; concept or principle: physical processes; material: feedstock materials; concept or principle: process control; concept or principle: defects
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: Manufacture; concept or principle: defect; concept or principle: process; concept or principle: physical processes; material: feedstock materials; concept or principle: process control; concept or principle: defects