| 摘要 |
1335053 Coating a copper wire with tin by hot dipping SIEMENS AG 12 Nov 1970 [13 Nov 1969(4)] 53974/70 Heading C7F A Cu or Cu alloy wire which is coated with Sn or Sn alloy by hot dipping is passed through a die of e.g. diamond, ruby or stainless steel having recesses around its inner surface, these being between 3 and 15 recesses per m.m. of the circumference of the die. The die may be between 20 and 120 cm above the bath, and it may be heated, e.g. electrically, to 180 to 220‹C. |
