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The insight into the arching phenomenon in twin-wire gas metal arc welding due to the investigation is expected to help the machine builders to design an appropriate controller that minimizes arc interference .
 manufacturing process: gas metal arc welding; machine or equipment: machine; engineering feature: design; machine or equipment: controller; concept or principle: arc
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 metal arc welding; machine or equipment: machine; engineering feature: design; machine or equipment: controller; concept or principle: arc