Gabatarwar samfur:
Square bututu ne m square giciye sashe haske bakin ciki-bangon karfe bututu, kuma aka sani da karfe refrigeration lankwasawa profile.Yana da zafi birgima ko sanyi birgima tsiri ko nada a matsayin tushe abu ta sanyi lankwasawa aiki sa'an nan sanya da high mita waldi square size size na karfe.Sai dai kaurin bango da kauri, girman kusurwa da santsin gefen duk sun kai ko ma wuce matakin juriya welded sanyi kafa murabba'in bututu.M kayan aikin injiniya, weldability, sanyi da zafi machining Properties da lalata juriya ne mai kyau, tare da mai kyau low zafin jiki taurin.
Yin amfani da bututun gini, masana'antar injiniya, ayyukan ginin ƙarfe, ginin jirgin ruwa, tallafin hasken rana, injiniyan tsarin ƙarfe, injiniyan wutar lantarki, injin wutar lantarki, aikin gona da injin sinadarai, bangon gilashin, chassis na mota, filin jirgin sama, ginin tukunyar jirgi, layin dogo, gidaje gini, tasoshin matsin lamba, tankunan ajiyar mai, gadoji, kayan aikin tashar wutar lantarki, injinan ɗagawa da sauran nauyin tsarin walda, da sauransu.