Non-standard cold pier parts:
Commonly used: various types of electronic coils as skeleton terminals, lead pins, etc.
Common materials; tinned copper clad steel wire, brass wire, phosphor copper wire, etc.,
-General material diameter; 0.5mm- 1.5mm,
-General precision control: soil 0.05mm
-General surface treatment: tin plating, nickel plating, silver plating, gold plating
