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7 Conclusions A detailed review of recent technological developments in WAAM process has been presented , with a focus on microstructure , mechanical properties , process defects and post-process treatment .
 manufacturing process: WAAM; concept or principle: process; concept or principle: microstructure; concept or principle: mechanical properties; concept or principle: process defects; concept or principle: post-process
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: WAAM; concept or principle: process; concept or principle: microstructure; concept or principle: mechanical properties; concept or principle: process defects; concept or principle: post-process