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In gas tungsten arc welding ( GTAW ) based additive manufacturing ( AM ) , omni-directional deposition with side feeding is common when depositing complex parts , which is different from the gas metal arc welding ( GMAW ) .
 manufacturing process: gas tungsten arc welding; manufacturing process: GTAW; manufacturing process: additive manufacturing; manufacturing process: AM; concept or principle: deposition; manufacturing process: gas metal arc welding; manufacturing process: GMAW
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: gas tungsten arc welding; manufacturing process: GTAW; manufacturing process: additive manufacturing; manufacturing process: AM; concept or principle: deposition; manufacturing process: gas metal arc welding; manufacturing process: GMAW