1097
Wire + Arc Additive Manufacture is a suitable technique to manufacture large-scale unalloyed tungsten components The orientation of the wire feeding influences the occurrence of defects as lack of fusion , pores and micro-cracks The orientation of the wire feeding influences the microstructure of the tungsten deposits Front wire feeding allowed to produce fully-dense crack-free unalloyed tungsten deposits The manufacturing of refractory-metals components presents some limitations induced by the materials ' characteristic low-temperature brittleness and high susceptibility to oxidation .
 manufacturing process: Wire + Arc Additive Manufacture; concept or principle: manufacture; material: tungsten; machine or equipment: components; concept or principle: orientation; process parameter: wire feeding; concept or principle: defects; material: as; concept or principle: fusion; machanical property: pores; concept or principle: micro-cracks; concept or principle: orientation; process parameter: wire feeding; concept or principle: microstructure; material: tungsten; process parameter: wire feeding; material: tungsten; manufacturing process: manufacturing; machine or equipment: components; concept or principle: materials; machanical property: susceptibility; manufacturing process: oxidation
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: Wire + Arc Additive Manufacture; concept or principle: manufacture; material: tungsten; machine or equipment: components; concept or principle: orientation; process parameter: wire feeding; concept or principle: defects; material: as; concept or principle: fusion; machanical property: pores; concept or principle: micro-cracks; concept or principle: orientation; process parameter: wire feeding; concept or principle: microstructure; material: tungsten; process parameter: wire feeding; material: tungsten; manufacturing process: manufacturing; machine or equipment: components; concept or principle: materials; machanical property: susceptibility; manufacturing process: oxidation