Based on the old non-bright tin electroplating, the sealing process was added.

在原有的雾面锡电镀工艺基础上，增加了封闭工序。

youdao

Based on the old non-bright tin electroplating, the sealing process was added.

在原有的雾面锡电镀工艺基础上，增加了封闭工序。

youdao