Tshwj xeeb zoo zoo steel yeeb nkab yog ib hom kev lag luam hla ntu steel tube nrog rau qhov tsis sib thooj hla ntu, vaj huam sib luag-thickness phab ntsa, sib txawv ntawm phab ntsa thickness, symmetrical seem, tsis-symmetrical seem, thiab lwm yam xws li square, duab plaub, conical, trapezoidal, kauv, lwm...
Nyeem ntxiv