Spotwelding requires both an electric current and a forging pressure to produce the weld.
点焊需要电流及锻压来产生焊缝。
2
In the main circuit, the inverse parallel couple SCRs (silicon-controlled rectifier) are used as a electric switch, switching the transformer of resistance spotwelding.
主电路以反并联的晶闸管作为控制开关，控制焊接用的电阻点焊变压器通电与否。
3
Brightness and excellent electric conductivity weldingspot after welding.