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In a recent study , pangolin scales were used as inspiration for bendable protective material for aerospace applications different combinations of hard plates and soft connecting material were 3D printed and mechanically tested .
 material: as; material: bendable protective material; application: aerospace; material: material; manufacturing process: 3D printed
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: as; material: bendable protective material; application: aerospace; material: material; manufacturing process: 3D printed