求翻译：及提高镀层与钢铁基件的结合能力。是什么意思？

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The operator should inspect strictly whether has the air vent and flows the zinc hole (air vent and flows zinc hole to be supposed for opposite angle), the material quality different, the corrosion degree difference very big treats plates to be supposed to classify carries on the acid pickling, if t

And increase the binding capacity of coating and steel base.