(English) Stranded copper wires are rolled into 630mm iron bobbin in conformation with the following standards:
| – Bobbin hole diameter | : | 127mm | |
| – Bobbin inner diameter | : | 355mm. | |
| – Bobbin outer diameter | : | 630mm. | |
| – Bobbin width | : | 444mm. | |
| – Bobbin iron weight | : | 73kg ÷ 78kg | |
| – Copper wire weight | : | 300kg/bobbin |
On each bobbin is labelled with the following content: copper type, actual diameter, weight, length, manufacturing date, QC staff name. Bobbin is covered with PE layer for package protection.
