common nail 4

common nail 4

...

common nail 4 common nail 4

Read More
  • (2) The construction is simple and does not need special technology;

    common nail 4

    ...

    common nail 4 common nail 4

    Read More
  • common nail 4

    ...

    common nail 4 common nail 4

    Read More
  • common nail 4

    ...

    common nail 4 common nail 4

    Read More
  • common nail 4

    ...

    common nail 4 common nail 4

    Read More
  • 1. Principle. Because zinc does not change easily in dry air, and in humid air, the surface can form a very dense film of zinc carbonate, which can effectively protect the interior from corrosion. And when the coating is damaged for some reason and the matrix is not too large, the zinc and steel matrix form a micro cell, so that the fastener matrix becomes the cathode and is protected. It is widely used in automobile transportation and other industries, but what is needed is the trivalent chromium passivation layer, zinc nickel alloy plating closed coating, reduce the harmful and toxic layer of hexavalent chromium passivation.

    common nail 4

    ...

    common nail 4 common nail 4

    Read More
  • hot

    common nail 4

    ...

    common nail 4 common nail 4

    Read More
  • 

    Popular articles

    Latest articles

    Links