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  • In addition, galvanized silk manufacturers can be required to passivation treatment after zinc immersion, after passivation treatment of zinc has a better anti-discoloration effect, can effectively extend the time of discoloration, the combination of the two, discoloration should be able to solve.

    iron nails factory

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    iron nails factory iron nails factory

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    iron nails factory

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    iron nails factory iron nails factory

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  • Post time: 11-01-23

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    iron nails factory iron nails factory

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  • Post time: 14-06-22

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  • galvanized

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