Steel Yeeb Nkab La Yog Qhov Tseem Ceeb Hauv Kev Siv Hluav Taws Xob kom hloov cov kua dej. Nws yog siv los txuas ob lub kav dej nrog tib lossis txawv nominal diameters, thiab ua kom cov yeeb nkab tig mus rau qee qhov kev taw qhia ntawm 45 degree lossis 90 degree.