earthing

1.The too high impact direct current high pressure may reduce the resistance of trouble point too fast, even turn into a metalline earthing trouble, thus bring the trouble to appointed work.

过高冲击直流高压可能会将故障点低太快，甚至变成金属性接地故障，从而给定点工作带来麻烦。

2.For instance, you should make sure that the insulations between the soldering tweezers and welding cable are ok and the earthing point and each termipoint of soldering machine are in good condition.

如焊钳和焊接缆绝缘是否有损坏地方，焊机外壳接地和焊机各接线点接触是否良好。