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Carbon da carbon-manganese karfe sumul karfe shambura da bututu don shipGB/T5312
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Bututun ƙarfe mara nauyi don tsari GB/T8162
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Sanyi-ja ko sanyi-birgima madaidaicin bututun ƙarfe maras sumulGB/T3639
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Bututun ƙarfe mara ƙarfi don matsanancin matsin lamba don kayan aikin taki GB/T6479
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Bututun ƙarfe mara ƙarfi da bututu don babban matsin tukunyar jirgiGB/T5310
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Bututun ƙarfe mara nauyi don ƙananan matsa lamba tukunyar jirgi GB/T5310
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Bututun ƙarfe mara nauyi don sabis na ruwa GB/T8163
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Bututun ƙarfe mara ƙarfi don fashewar man feturGB/T9948
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M matsakaici carbon karfe tukunyar jirgi da superheater tubes ASTM A210