Square steel bar, yomwe imadziwikanso kuti square steel rods, ndi chitsulo chokhala ndi gawo lalikulu la mtanda. Amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana chifukwa cha mphamvu zawo, kulimba komanso kusinthasintha. Odayi idagulidwanso ndi kasitomala waku Iceland chifukwa cha ntchito yake yomanga. Mu...
Werengani zambiri