How to deal with zinc surface defects？
Control the content of aluminum and iron in zinc liquid.
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Control the content of aluminum and iron in zinc liquid.
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The name of the C-shaped steel variety.
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For rectangular tubesheet, the temperature of the holding section is considered according to the width of the slab, and the heating time is specified clearly ···
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The corrugated design of the roof panel is not only beautiful, but also can distinguish the roof panel from the wall panel. The unique corrugated design can als···
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After the roof panels are assembled on the gable beams on the top floor of the house, the wings overlap to cover multiple single box roof panels without vertica···
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