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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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Fiberglass grating is a kind of plate-shaped material with many spaces, which is made of glass fiber as a reinforcing material, unsaturated polyester resin as the matrix, and a special processing compound. It can be used as a structural material and used as a corrosive material. Environmental floors, trench covers, platforms, ship decks, stairs, plank roads, etc. It has the characteristics of corrosion-resistant, flame-retardant, non-magnetic insulation, bright colors, and a variety of styles.