292
The experimental results show that the control of the weld melting offset is the key factor in realizing the stability and accuracy of omni-directional GTAW-based AM .
 concept or principle: experimental; engineering feature: weld; manufacturing process: melting; machanical property: stability; process characterization: accuracy; manufacturing process: AM
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:
 concept or principle: experimental; engineering feature: weld; manufacturing process: melting; machanical property: stability; process characterization: accuracy; manufacturing process: AM