220 KV substation steel tower 1.material: Q195,Q235,Q345 2. angle steel tower 3.certificate: ISO 4.after-sale ... Q195,Q235,Q3452,equipments: defectometer, gas cutting machine, plate-shearing machine, bender, drilling machine, lathe, arc-submerged welder, flaw defactor, ... glossing machine, galvanizing equipment, posiTest DFT3,Service: design, quotation, ...