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Duplex nails are incredibly versatile and can be used in various applications beyond temporary structures. They are frequently utilized in roofing, fencing, and framing tasks. The robust steel construction offers excellent holding power, while the ability to remove them easily without causing damage makes them ideal for projects where the longevity of the structure may not be guaranteed.

Manufacturers also appreciate small coil black iron for its adaptability in producing valuable components like reinforcement bars. These bars are critical in cement structures, providing the necessary support and durability. In fact, black iron's ability to resist deformity under stress makes it an excellent choice for structural applications in high-stress environments.

Sulphur trioxide is formed when sulphur dioxide reacts with oxygen in a ratio of 1:1 at a temperature of 400 °C – 450°C and a pressure of 1-2 atm in the presence of V2O5 as a catalyst. This reaction is reversible in nature.