hat
4. nan pwodiksyon ak itilizasyon, ka sezon prentan an espiral tou gen pou divize an de kalite: gwo sezon prentan espiral ak ti sezon prentan espiral dapre metòd la fòme ak dyamèt la nan materyèl la. Ansyen an se anjeneral cho fòme, ak lèt ​​la se frèt fòme.
eng
4. in production and use, the spiral spring can also be divided into two types: large spiral spring and small spiral spring according to the forming method and the diameter of the material. The former is usually hot forming, and the latter is cold forming.