Platinum doping is need before nickel chemical plating for FR rectifiers.
快恢复二极管需要在化学镀镍前扩铂。
If it is K platinum, a long time outside silvery white layer of wear and tear, inside gold exposure, is no longer white, so also need regular maintenance plating white, can maintain long new.
如果是K白金，时间一长外面银白层磨损，里面黄金暴露，就没有以前那么白，所以也需要定期保养镀白，才能保养长新。
Platinum plating gives the silver setting a rich sheen and also makes it tarnish-proof and hypoallergenic.
白金电镀银设置赋予了丰富的光泽，也使得它玷污，证明和低过敏。
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