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Igwe ISO 2568 na eriri gburugburu aka na-anwụ
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Igwe DIN223 na eriri gburugburu aka na-anwụ
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DIN5158 Igwe na eriri gburugburu aka na-anwụ
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DIN382 hexagon anwụ mkpụrụ
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BS1127 na-agbanwe agbanwe Round High Speed steel anwụ mkpụrụ
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BS1127 Hexagon High Speed Steel anwụ Akụ
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NFE-74001M Mgbanwe Na-agbanwe agbanwe na-anwụ