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When soldering galvanized iron, the first step is to prepare the surface properly. This may involve cleaning the area to remove any corrosion, dirt, or impurities that could affect the bond. It's also essential to remove a small portion of the zinc coating at the soldering point to facilitate a better connection between the solder and the base metal.
The production of metal tool boxes with drawers involves several key manufacturing processes. Factories typically start with sheet metal, which is cut to size using CNC machines for precision. This ensures that each component will fit perfectly, especially the drawers, which must slide smoothly and be easy to access. After cutting, the metal is stamped or bent into shape and assembled into a frame that forms the backbone of the tool box.