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Amongst various geometrical features that can be realized in weld-deposition based AM , the thin-walled features ( i.e. , features with one single deposition pass ) are the toughest as the process has to overcome the bead-over-bead complexity .
 engineering feature: geometrical features; material: be; manufacturing process: weld-deposition based AM; concept or principle: deposition; material: as; concept or principle: process; concept or principle: bead-over-bead
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:
 engineering feature: geometrical features; material: be; manufacturing process: weld-deposition based AM; concept or principle: deposition; material: as; concept or principle: process; concept or principle: bead-over-bead