mainly used Finishing (contain copper,nickel , zinc plated and other basic plating and rinse chromium ) & plating copper ,nickel Main use: ... of Metal Finishing (contain copper,nickel , zinc plated and other basic plating and rinse chromium ) & plating copper ,nickel on the ... -currentover-heating ,over-loading ;4,this product with acoustic and optical alarming (bug or timed) function;5,this product ...