Add the workpiece fixed in the coil, coil discharge at the moment have a damping pulse magnetic fielddecay, so that the loss of magnetic parts.
工件放入线圈中不动，线圈在放电瞬间产生脉冲阻尼衰减磁场，使工件失去磁性。
2
The essential condition for the decay of the vacuum is the presence of an intense electric field.
真空衰变的基本条件是存在强电场。
3
As a result of the decay of the vacuum, the space permeated by such a field can be said to acquire an electric charge, and it can be called a charged vacuum.