For instance, you should make sure that the insulations between the soldering tweezers and welding cable are good , the chassis of the soldering machine is well grounded, and all wiring contacts are in good condition.

• 如焊钳和焊接电缆的绝缘是否有损坏的地方，焊机的外壳接地和焊机的各接线点接触是否良好。