Galvanized square pipe is a hollow square section steel pipe with a square section shape and size made of hot-rolled or cold-rolled galvanized strip steel or galvanized coil as a blank, cold-bent and formed by high-frequency welding.ឬប្រព័ន្ធចតុកោណដែលបានបង្កើតដោយប្រព័ន្ធប្រព័ន្ធប្រព័ន្ធដែលបានបង្កើតដោយប្រព័ន្ធ