An samar da bututu maras sumul a cikin yanki guda, an soke shi kai tsaye daga zagaye na karfe, ba tare da walda a saman ba, kuma yana da nau'ikan aikace-aikace.Saboda aiki na musamman na bututun ƙarfe maras sumul, carbon structural steel, low alloy structural karfe, da sauransu ana amfani da su gabaɗaya don samarwa, ...
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