#Problem - A stain works by binding with the copper wire.
A stain works by binding with the copper wire.
Cause
* Tie a piece of copper wire is too tight. or The plated copper wire is a short circuit between positive and negative features.*
- This piece of copper wire to clear out and clean This piece of copper wire to clear out and clean a new copper wire. To tighten it. Do not get too tight, and then began to dip plating again.

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