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The production of corrugated steel sheet doors involves several intricate steps, beginning with the selection of high-grade steel sheets. Factories employ advanced machinery to feed, cut, and shape the steel into the desired corrugated designs. This process enhances the door's strength while also allowing for customization in terms of size and design.
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The factory process behind metal lunch boxes often involved a series of intricate steps. First, the raw materials were sourced and cut into the appropriate sizes. Next, the metal sheets underwent printing, where vibrant colors were applied to create eye-catching designs. The pieces were then shaped, bent, and fused together, creating a sturdy construction that could withstand the rigors of daily use. Finally, a protective coating was applied to guard against rust, ensuring these lunch boxes would endure for years.
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