Sanin bututun ƙarfe: API 5L bututun ƙarfe mara nauyi shine bututun ƙarfe mara ƙarfi API 5L bututun ƙarfe mara nauyi, bututun ƙarfe mara nauyi, bututun bututun ƙarfe: GR.B, X42, X46, 52, X56, X60, X65, X70.Ana amfani da bututun layin don jigilar mai, iskar gas da ruwa da ake zubda o...
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