Because after annealing line is very soft, corresponding to different wire diameter to use appropriate tension weight, if wire diameter small tension is big, will be the wire diameter and thin.
But in the continuous annealing, copper wire heating make wire become soft, line itself has certain extension.
但是在连续退火时，铜线发热使线材变软，线本身就有一定的延伸。
3
Copper wire color (dark red or white) : continuous annealing in the work period of the line burn soft and pass cooling section after cooling can achieve lead not hot, without water.