| 57 / | HD | TEXTILES: SPINNING, TWISTING, AND TWINING |
| 200 | DF | STRAND STRUCTURE {11} |
| 210 | DF | .~ Covered or wrapped {10} |
| 212 | | .~.~ Wire wrapped {4} |
| 213 | DF | .~.~.~> Plural wire wrapped layer {4} |
| 218 | DF | .~.~.~> Stranded wire-wrapped layer {3} |
| 222 | DF | .~.~.~> With core other than wire |
| 223 | DF | .~.~.~> Coated or impregnated |