At present, which corrugated steel web manufacturer in China can realize multi-wave continuous compression?

Hello, at present, only the B ramp bridge of Yuwotou Interchange in Panyu, Guangzhou has realized multi-wave (three-wave) continuous compression of corrugated steel webs, which is a processing project of corrugated steel webs undertaken by Henan Dajian Steel Structure Co., Ltd. Multi-wave continuous compression means that the three webs formed by submerged arc welding have no welds now, which greatly improves the stability and fatigue resistance of the structure and is also very beautiful.