Kev faib tawm ntawm cov kav hlau tsis muaj hlau: ob hom yeeb nkab hlua: seamless steel yeeb nkab thiab cov yeeb nkab hlua fais (sewn yeeb nkab). Raws li cov duab ntawm seem, nws muaj peev xwm raug muab faib ua cov raj thiab khis tshwj xeeb. Nws yog dav siv nyob rau hauv yeej steel tube, tab sis muaj qee cov square, rectangular, semicircular, hexagonal, equilateral daim duab peb sab, octagonal thiab lwm yam tshwj xeeb-puab steel tubes.
Cov yeeb nkab tsis muaj cov khoom siv, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov chaw tsim tshuaj, cov khoom siv tshuaj, kev lag luam, kev lag luam, cov khoom siv hauv tsev ua noj haus, kev lag luam tsheb, cov tais diav, kev txuag hluav taws xob, hluav taws xob, ntawv, txuag hluav taws xob, tub yees, choj, boiler, armored. Tshem, hnub ci, hnub ci, hnub ci, hnub ci, hnub ci, hnub ci, hnub ci, hnub ci, hnub ci, hnub ci, hnub ci, hnub ci, khoom siv hluav taws xob, .
