N of a degree of an angle 角秒; 一度的三千六百分之一
One second of arc movement is one thirtieth of a millimetre.
一弧秒的移动是一毫米的三十分之一。
One second of arc movement is one thirtieth ofa millimetre.
一弧秒的移动是一毫米的三十分之一。
Dynamic process of current is controlled quickly by the first inverter, and arc polarity is controlled by the second inverter of arc welding power source.
弧焊电源一次逆变控制电流快速动态过程，二次逆变控制电弧极性。
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