Third: Inverter-based welders let operators adjust the welding output frequency, from 20 to 250 Hz in the case of the Dynasty.
第三：逆变型焊接焊工让操作调节输出频率，从20到250赫兹的情况王朝。
Third: Inverter-based welders let operators adjust the welding output frequency, from 20 to 250 Hz in the case of the Dynasty.
第三：逆变型焊接焊工让操作调节输出频率，从20到250赫兹的情况王朝。
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