| 摘要 |
<p>1090-27 A WELDING BAND The invention relates to a welding band for welding synthetic resin film comprising a steel band, which is coated in its end parts with a thin copper layer. In order to attain the aim of so improving such a welding band that its working life is substantially increased, the thin copper layer is covered with a, relatively, even thinner metallic layer, for example, of nickel.</p> |
