Mu 'yan ƙwararrun masana'antu ne da mai samar da bututun ƙarfe ko shambura, tare da cikakkun kewayon kayan kwalliya kamar galvanized, anded, ƙirƙira, ƙirƙira, ƙirƙira, ƙirƙira, ƙirƙira, ƙirƙira, ƙirƙira, ƙirƙira, ƙirƙira, ƙirƙira shi, ƙirƙira shi, ƙirƙira shi, ƙirƙira shi, ƙirƙira shi, ƙirƙira abubuwa).
Standard:Astm A53, Astm A106, en10255, AS1019, EN19, AS1387, AS1387, Anssi c80.1, kamar yadda 1074
Maki:A53, A136 Gr.a, Gr.B, Gr.cc, S235, SS400, Q145, Q235, Q245, Q245, Q245, Q245, Q245, Q245, Q245, Q245