16 11 月 2017
16 11 月, 2017

Nine Types of Fastener Surface Treatment

Manufacturer ZZ provides various coating of bolts and nuts for overseas.

There are nine types of Fastener Surface Treatment, like Electro-Zinc, Phosphating, Oxidation (Blackening), Cadmium(Electro) Plating, Electrochromism, Silver and Nickel Plating, Hot-Dip Zinc, Zinc Infiltration and Dacromet
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