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To further the embedding capabilities of UAM , in this paper we examine the ultrasonic welding of aluminium foils with features machined prior to bonding .
 manufacturing process: UAM; manufacturing process: ultrasonic welding; material: aluminium; manufacturing process: machined; concept or principle: bonding
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:
 manufacturing process: UAM; manufacturing process: ultrasonic welding; material: aluminium; manufacturing process: machined; concept or principle: bonding