| 摘要 |
<p>At least one power supply hanger (4) of highly electroconductive material, e.g. iron or copper, is connected to an electrode plate which has a base member comprising a core member (1), e.g. of iron or copper, coated over its whole surface with a film (2) of highly corrosion resistant metal, e.g. Ti, Ta, or Nb. A layer (3) of lead or lead alloy is built up on one side surface of the base member. </p> |
