brief introduction: Single core wire: a single core wire with only one conductor in the insulation layer. Single-core wire advantages: good softness, good heat dissipation, good skin resistance, good break resistance. Disadvantages of single core wire: poor tensile resistance, easy to break mold, poor anti-surge current, inconvenient shaping. Single-core wire and multi-core wire: the difference between the structure is different, because the multi-strand copper wire is soft, not easy to break the core, it is suitab