Chitoliro chowotcherera chotalikirapo chotalika kwambiri chimagwiritsidwa ntchito popanga chitoliro chachitsulo cha φ8 ~ φ610 mm ndi makulidwe a khoma la 0.5 ~ 20mm komanso kupanga masikweya, amakona anayi, ndi mbiri ina yopanda chitoliro, chitoliro chachitsulo cha Mpweya. , ERW chitsulo chubu. Mzerewu ukhoza kupanga mapaipi opangidwa ndi welded ndi makina abwino komanso osakanikirana kwambiri pa liwiro lalikulu.