Galvanized square steel pipe is a hollow square section steel pipe with a square cross-section shape and size that is formed by cold bending and high-frequency welding using hot-rolled or cold-rolled galvanized strip steel or galvanized coil as the blank. ឬប្រព័ន្ធចតុកោណដែលបានបង្កើតដោយប្រព័ន្ធប្រព័ន្ធប្រព័ន្ធដែលបានបង្កើតដោយប្រព័ន្ធ