1444
4.2 Porosity Porosity is another common defect in WAAM processing that needs to be minimized due to adverse effects on mechanical properties .
 machanical property: Porosity; concept or principle: defect; manufacturing process: WAAM; material: be; concept or principle: mechanical properties
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:
 machanical property: Porosity; concept or principle: defect; manufacturing process: WAAM; material: be; concept or principle: mechanical properties