When an electric arc is produced in the material, light is produced.
一种物质中产生电弧时，光就产生了。
Stable electric arc can be ensured from undercurrent to high current.
从小电流到大电流都可以保持稳定电弧。
Temperature is one of the important physical features of electric arc.
温度是电弧的重要物理特性之一。
Temperature is one of the important physical features of electric arc.
温度是电弧的重要物理特性之一。
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