The results show that the current flows during VAR from crucible wall to the electrode via the surface of the ingot melt pool, and the currents in the crucible base and the ingot base are almost zero.
结果表明：重熔电流从坩埚壁经熔池表面流回电极，铸锭和坩埚底部几乎没有电流；
At least two moving supporting rods which make the electric current conduct are provided between the spherical surface of the spherical contactor and the base.
球形接触器的球面与底座之间设置至少两个使电流导通的移动支杆。
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