Thick walled steel yeeb nkab, cov yeeb nkab steel uas nws qhov sib piv ntawm sab nraud rau phab ntsa thickness tsawg dua 20 yog hu ua tuab phab ntsa steel yeeb nkab. Nws yog tsuas yog siv raws li roj av geological drilling yeeb nkab, tawg yeeb nkab rau petrochemical kev lag luam, boiler yeeb nkab, bearing yeeb nkab, high-precision structural yeeb nkab rau tsheb, tsheb laij teb thiab aviation, thiab lwm yam.