1. Rectangular tubes are widely used in engineering fields such as construction, bridges, water conservancy, and electricity due to their high strength, corrosion resistance, fire resistance, and easy processing, to improve structural stability and safety.

2. In transportation, mechanical equipment, and industrial equipment, rectangular tubes are key components to ensure the stable operation of facilities and the efficient transportation of materials.

3. Rectangular tubes are also used in the manufacture of furniture and decorations, showing their beauty and practicality. With the development of technology, their application areas will continue to expand.

eld of square tubes will continue to expand and become an indispensable and important material in many industries.