205
Waviness , weld cracks , porosity , and discontinuity of weld bead of a surface can be reduced by selection and optimising the parameters ; otherwise , irregular shapes will come during the manufacturing of thin or thick wall construction by Wire Arc Additive Manufacturing .
 engineering feature: Waviness; engineering feature: weld; machanical property: porosity; concept or principle: weld bead; concept or principle: surface; material: be; concept or principle: parameters; manufacturing process: manufacturing; application: construction; manufacturing process: Wire Arc Additive Manufacturing
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: Waviness; engineering feature: weld; machanical property: porosity; concept or principle: weld bead; concept or principle: surface; material: be; concept or principle: parameters; manufacturing process: manufacturing; application: construction; manufacturing process: Wire Arc Additive Manufacturing