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Welding is another critical step in the manufacturing process, where pieces are fused together to create a sturdy structure. Factories today have upgraded their welding techniques, utilizing robotic welders for consistency and strength. After assembly, the metal surfaces undergo cleaning and priming to prepare for painting, which protects against rust and enhances appearance. Finally, drawers are added, and the entire unit is subjected to quality control checks to ensure durability and functionality.
metal tool boxes with drawers factories

The pH of wastewater can significantly impact the efficacy of treatment processes. Chemicals like sulfuric acid (H₂SO₄) or sodium hydroxide (NaOH) are employed to adjust the pH levels, ensuring optimal conditions for microbial activity during biological treatment stages. Maintaining an appropriate pH is crucial for maximizing the breakdown of organic matter and promoting the growth of beneficial microorganisms.
chemicals used in sewage treatment
